This calculator has 1 input. If we choose the number to be n then 5 more than is 5 added to the number. Why cant we have an actual division sign? Now, well evaluate the value of \large{x = 4} to verify if the number we found satisfies the original algebraic sentence. five times the difference of a number and one Write an expression for the number of rock CDs. Doing homework can help you learn and understand the material covered in class. However, for our discussion, we will use 6 + 7x = 34 as our equation. 5 (n + 8) First the number is increased by 8 (adding 8) Then you multiply the result by 5. Let x represent the number. use 3 as the estimate of . Thus, the answer is the number 10. We will not only translate and write algebraic sentences into algebraic equations but also proceed to solve them. Answers: 2 on a question: Give the Algebraic Expression for each following verbal phrases. Example 4: Four times the sum of twice a number and six is thirty-two. You earned 75% on your badminton practical. Direct link to Olivia S.'s post Can their be more than 1 , Posted 3 months ago. So we had an expression about division, and it's usually not as sweet and straightforward with obvious words like these. Translate the given word phrase into an algebraic expression: How old will you be in eight years? Hope that helps! 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Notice that we used the variable \large{d} in our equation to stand for our unknown value. Similarly, when we describe an expression in words that includes a variable, we're describing an algebraic expression (an expression with a variable). Once you know how to translate math phrases into algebraic expressions, itll be easy for you to translate and write algebraic sentences in an equation form as well. The original problem asks us to find the number which in this case is \large{x}. 5 more than 8 times a number. Looks like everything checks out, so the answer to our algebraic sentence is the number 1. Of is the tricky word. Question: Write the English phrase as an algebraic expression. So, the phrase. Name them. In the following exercises, evaluate the expression for the given value. Test. 3. x^3-46. So, the correct answer is "x+5". They tell us the operation is subtraction. Find the number. php. Example 6: Twice the difference of a number and three is four more than the number. Flashcards. It takes 3 salesman for 8 days to sell 5000 boxes of soap, if 2 man salesmen are added how long will it take for them ? Numbers or Constants One of the many reasons is that math is more precise and easier to work with than words are. Let \(q\) represent the number of quarters. Selecting the letter m as our variable, the algebraic expression for this math phrase is simply 5m. This problem involves a fraction and an algebraic expression as you can tell. If you're seeing this message, it means we're having trouble loading external resources on our website. B 3. Notice that the phrase "decreased by" tells us to use subtraction. nine times a number 2.) Choose your answers from the box. Direct link to SherlockHolmes.42's post Saying that n is the numb, Posted 4 years ago. Direct link to Kim Seidel's post Yes, "of" is a multiplica, Posted 2 years ago. 5+2 5+2. Alg 1: 2021 - 2022. In the following exercises, list the terms in the given expression. Hence "5 more than a number" written as an algebraic expression is "x+5". Direct link to Nicholas's post That is a common way to r, Posted 7 years ago. Explain why the sum of x and y is the same as the sum of y and x, but the difference of x and y is not the same as the difference of y and x. Try substituting two random numbers for x and y to help you explain. For the unknown value, well use \large{x} as our variable. All fractions are rational. Write a phrase about the number of dimes. Find the number. the sum of a number and twelve 3.) Subtracted, minus, difference, less than, decreased by. It means 5 times the unknown number m. Remember to replace the unknown value of the variable \large{g} with the number 7 to see if the left side of the equation is also equal to 16. Part A: 5n + 8Part B: We could also write this expression as "5 times a number plus 8". Definition: Mathematical Expression When we combine numbers and variables in a valid way, using operations such as addition, subtraction, multiplication, division, exponentiation, and other operations and functions as yet unlearned, the resulting combination of mathematical symbols is called a mathematical expression. To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. Blanca has dimes and quarters in her purse. Learn. A number plus one is divided by three times the number minus twelve and the result is four. 7:4 d. 6:4 Pa-Help naman po kailangan na po kasi Direct link to HannahTran2005's post Well for one, I think tha, Posted 6 years ago. Translate the word phrase into an algebraic expression: Later in this course, well apply our skills in algebra to solving equations. Find the circumference using this estimate. 12,000d. 2018 innaugural Summer 3 vs 3 League. (06.02 MC) Part A: Write an algebraic expression for 8 more than 5 times a number. Write an expression for the width of the rectangle. 3 vs 3 Results and Standings (5th-6th Grade) 3 vs 3 Results and Standings (7th-8th Grade)1 Algebra 1 Quarter 1 - Benchmark Review Packet Answer Section MULTIPLE CHOICE 1. They tell us the operation is addition. You can specify conditions of storing and accessing cookies in your browser. Well use the variable \large{y} as the placeholder for our number whose value is currently unknown. Many teachers in the early math years may not be doing That's a great question! If the practical was out of 88, what mark did you earn? This is a pretty easy problem that gives lots of students difficulty. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. eight times the sum of forty and c 14).six more than twice a number is 18 15). learners participate in each sport. More than means "added to". Morion Mask Mood Message IV. the difference of two times \(x\) and \(8\), two times the difference of \(x\) and \(8\). Sometimes in math, we describe an expression with a phrase. Almost always, the word is in an algebraic sentence denotes the symbol of equality. Notice that since the phrase "three times the number minus twelve" does not contain a comma, we get the expression $3 x-12$. How do you write a product of a number and 2 as an expression? 8 more than a number algebraic expression. How do you write 5 less than 2 times a number as a variable expression? Lets take a quick look at some math phrases that were translated and written into algebraic expressions. How do you evaluate variable expressions? As discussed in our first example, it is important that we verify if the result of our solution makes the algebraic equation true. Direct link to 403824's post why is fraction considere, Posted 2 years ago. Thus, 2 a, x + 5, and y2, Right away, the word difference in our algebraic sentence gives us a clue that we will be using the subtraction operation. Therefore, we can write this algebraic sentence in equation form as 16 - k = 7. How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ? can be written as the expression. What age is eight more years than your age now? The length of a rectangle is \(5\) inches less than the width. Let \(w\) represent the width of the rectangle. Lets deconstruct this algebraic sentence. creating a lapbook inmath project, Translate the following word phrases into algebraic expression equation (solve the system of equations For example: why is fraction considered as a division? Write an expression for the height of the window. Direct link to ~panda boy jickle~'s post why does the square over , Posted 5 years ago. Let t represent the number of tens. 75% of 64=2.16% of 80=3.14% of 30=4.60% of 30=5.50% of 18=. Posted 5 years ago. 1. 11:7b. In the problem above, x is a variable. Example 1: Six more than seven times a number is thirty-four. The number of fives is three more than six times the number of tens. 16 + 5xd. B. The difference between five times a number and one more than three times the number. Question sent to expert. The quotient of 10x 10 x and 3 3. Well need to be clear about what the expression will represent. 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https://status.libretexts.org, a b, a / b, \(\dfrac{a}{b}\), \(b \overline{) a}\). 16x + 5c. What is the number? Write an expression for the cost of the skirt. half a number plus two 6.) Being able to break apart our algebraic sentence into its basic parts allows us to read the sentence thoroughly and understand the relationship between its quantities. How could algebraic expression be used in everyday life? Write an expression for the number of pennies. hence: n + 5 Answer link Here we are taking the sum of five times \(m\) and \(n\). a. Algebraic expressions are useful because they represent the value of an expression for all of the values a variable can take on. Match. It evolved from the fraction idea to make it a simpler concept in arithmetic. twice a number decreased by eleven 4.) Less than means subtracted from. Use the letters x and y as variable Technology and Home Economics, 04.04.2022 02:55, Edukasyon sa Pagpapakatao, 04.04.2022 02:55, Add a question text of at least 10 characters. Algebraic Expressions and Key Words for Multiplication The key words for multiplication are: times, product, twice, doubled, multiplied, and of. Eight more than a number is just 8 + n in algebra. But before we delve into solving word problems that involve algebraic sentences . Marcella has 6 fewer male cousins than female cousins. Calculate how many A. Compost B. soil holder C. nitrogen D. rainwater collector C. TAMA O MALI The Grade 8 learners decided to start training more. 46829 views (5 points). Yes, "of" is a multiplication word when used with percents and fractions. Find the number. The main key when solving word problems with algebraic sentences is to accurately translate the algebraic expressions then set up and write each algebraic equation correctly. A. |4x + 2| 3 = 7, If a technician earns php 75.00 per hour and works 40 hours per week, what is his monthly pay? For instance: computer programming/computer science. by their experience and knowledge about this work experience, because if their are teachers included they must show their skills and knowledge about this position, The basic unit used by the early babylonians in measuring weight? How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ? Identify the function of the underlined noun in each sentence. 7 less than 5 times a number 3. Three times a number by seven is twenty pls answer my question ty:) they should to see if you are good thinking, why dose p+p-p+p+p work in the answers but some thing like 2 1/2 not work. They are summarized in Table \(\PageIndex{3}\). 5 time a number. In the following exercises, simplify the given expression by combining like terms. Direct link to andrea's post So we had an expression a, Posted 3 years ago. Then the following equation can represent this problem: 17 + x = 68 We can subtract 17 from both sides of the equation to find the value of x. 11).five subtracted from b, Add a question text of at least 10 characters. This is seven years less than your age now. Let n represent the number of nickels. See Answer. Now that we have our equation, lets find out what the unknown value is by solving for the variable, \large{g}. Greg has nickels and pennies in his pocket. I. Learn how to write an algebraic expression from verbal sentence as well as writing out a sentence from a algebraic expression. Direct link to jacob_tolle's post How could algebraic expre, Posted 7 years ago. Direct link to Archer8888's post I like to think of fracti, Posted 6 years ago. Algebra 1 2022-2023. B. answer and Justi bumuo ng isang katotohanan at isang opinyon tungkol sa sumusunod na isyu isulat ang iyong sagot sa buong papel true answer nag joke mababaog. My questions is, what are other ways to say 'divided by' and can you give me examples? 2. Twice a number, decreased by 7 7. Let \(n\) represent the number of nickels. 5 more than 2 times a number 2. 16 - 5xOption 45. Look for the words of and and to find the numbers. How do you write a product of a number and 2 as an expression? around the world. Match. Here is a table that summarizes common words for each operation: For example, the word product tells us to use multiplication. Example 2: The difference between three times a number and five is sixteen. But, unlike, in addition, the order of the terms within an expression matters in subtraction. Writing Algebraic Expressions Step-by-Step Examples. Algebra 2020-2021. In our example above, the algebraic sentence, Five more than twice a number is forty-three, is translated and written into its equation form: 2x + 5 = 43. So our next step is to solve for \large{x} in our equation, 6 + 7x = 34. . Complete the table below. How do you evaluate the expression #2x+1# for #x=1#? the quotient of five and a number 7.) belen is a regular pentagon. Look closely at these phrases using the four operations: Each phrase tells you to operate on two numbers. To Translate English Phrases Into Algebraic Expressions. The height of a rectangular window is 6 inches less than the width. carning Task 1: Observe the picture carefully. Let w represent the width of the window. are 125 Grade 8 learners, and they box and grid in the ratio How do you write a quotient of a number and 6 as an expression? So a number 5 more than x is equal to x+5. Notice how the use of parentheses changes the result. why does the square over the square mean divided? Practice Problems: Translate each phrase into an algebraic expression. Now well reverse the process and translate word phrases into algebraic expressions. Looking closely, we see a few keywords that would help us in translating this algebraic sentence into an equation. You can specify conditions of storing and accessing cookies in your browser, Part A: Write an algebraic expression for 8 more than 5 times a number. Let b represent the cost of the blouse. This content produced byOpenStaxand is licensed under a. The keyword of indicates multiplication, so it tells us that we need to multiply the fraction \large{2 \over 3} by the sum of the two given quantities (three times a number and six). Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer smendyka Mar 3, 2018 See a solution process below: Explanation: First, let's call "a number": n Next, "twice a number" means to multiply the number by 2 giving: 2 n or 2 n or 2n Then, "five more than" means to add 5 to what follows or: 2n +5 Answer link In algebraic form 5 times a number increased by 8 is. 4(n + 6) 4 times the . d. What do you notice about the estimate used for and the circumference of the circle? A. Explain the difference between 4 times the sum of x and y and the sum of 4 times x and y., Lynn Marecek (Santa Ana College) andMaryAnne Anthony-Smith (formerly of Santa Ana College). We need to evaluate the value of \large{m = 8} to check if the number we got makes our algebraic equation true. Nonsense answer = ReportMay-Flower Ship Directions: 1. answer each given qu Where can we change the elements of graph? In the previous section, we listed many operation symbols that are used in algebra, and then we translated expressions and equations into word phrases and sentences. Because we are multiplying \(5\) times the sum, we need parentheses around the sum of \(m\) and \(n\). Five more than this will be: 3 q + 5 \quad 3q+5 3 q + 5. Let c represent the number of classical CDs. 1. This time, lets use \large{g} as our variable. In the following exercises, translate the given word phrase into an algebraic expression. Therefore, it will be incorrect to say that \large{x=4} is the answer. Tamang sagot sa tanong: Translate the phrases to algebraic expressions. *1 pointa. can be written as the algebraic expression. 1. Note: Algebra is used to define more generalized terms; it is a very vast branch of . Which of the following expressions represents the sum of 16 and five times a number? Exercises: solve the following absolute value equations. For example, the phrase " 2 2 more than 5 5 " can be written as the expression 2 + 5 2+5. Adele bought a skirt and a blouse. Write an expression for the number of girls. D. All terminating decimals and non-repeating are rational. Give the Algebraic Expression for each following verbal phrases. Finally the expression will be: 3 q + 5 \quad 3q+5 3 q + 5 The keyword half of also indicates multiplying something by one-half while the decreased by tells us that we will be subtracting one term from the other. Answer link. Remember that #d# is just an unknown number. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. To organize our thoughts, lets deconstruct this algebraic sentence into its meat and potatoes. How do you simplify the expression #3x-x+4#? Write an expression for the number of boy cousins. The passing rate for the final exam was 80%. Think of an algebraic expression as the equivalent of a phrase in the English language. (a) After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section. Terms that are either constants or have the same variables with the same exponents are like terms. shinokada. 4 times the quantity of a number and six. For this one, I will leave it up to you to evaluate the value of \large{g = 7}. CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Direct link to bruh's post Well, if b doesn't have v, Learn to write expressions for phrases like "3 more than x.". After setting up our algebraic equation, our next step is to solve it for \large{m}. Test. more than comes after. Example 5.5.10. 9 decreased by 4 times a number 4 . Let \(q\) represent the number of quarters. To do this we need to know . "\(5\) times the sum of \(8\) and \(x\)" . Almost always, the word "is" in an algebraic sentence denotes the symbol of equality. About this tutor . php. 2 more than 7 times a number 8. In the following exercises, identify the coefficient of the given term. In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations Given, 8 more than 5 times a number Consider the number is x Then, 8 more than 5 times a number is 5x+8 Hence, Algebraic expression for 8 more than 5 times a number is 5x+8 Learn more about Algebraic expression here Yes, it does! But why? , .14 for . a. five more than the square of a number b. seven less than six times a number c. three times the difference of two numbers There are two operation words: times tells us to multiply and sum tells us to add. "5 more than" means add 5 onto a number. Lets now proceed and solve for \large{d} and afterward, check if the value we get indeed makes the equation true. If you're looking for support from expert teachers, you've come to the right place. Explanation: Remember that d is just an unknown number. x+3. Direct link to Michelle Hoeks's post So Ive got a math questi, Posted 4 years ago. Learn. In the following exercises, identify all sets of like terms. 9 less than a number 9. On the plate is still 1 whole cake or we could say there are two halves (2/2), if we divide 2 by 2 we get 1 or a whole cake (2/2). There Created by. The number of dimes is seven less than six times the number of quarters. Do you think it's important to check your heart rate after a walking activity? * 1 pointa. 4 - 3xc. How do you write a quotient of a number and 6 as an expression? 146. You take your half (1/2), now I have one half (1/2). Identify the mood and the essage it tries to convey. Its time for us to solve for \large{y} then Ill leave it up to you to do a check if the number we find as the value of \large{y} makes the algebraic equation true. Tamang sagot sa tanong: Translate the following word phrases into algebraic expression equation 11).five subtracted from b 12).ten more than 13). But before we delve into solving word problems that involve algebraic sentences, its crucial that we become familiar with how to translate and write algebraic expressions. Upvote 0 Downvote. 3:2. This algebraic sentence is quite interesting because we dont just have one unknown value, but two! b. First, we have the number (the unknown) then the half of the number, which means one-half of the unknown. Eric has rock and classical CDs in his car. We are able to translate our algebraic sentence into an equation. Ang edukasyon ang susi para magkaroon ng magandang kinabukasan. Write a algebraic expression for 8 more than 5 times a number. First, lets deconstruct the algebraic sentence. Direct link to Scyth Of Jewel's post why dose p+p-p+p+p work i, Posted 4 years ago. Future Warriors Boys Basketball. Lets go over more examples. How do you write 5 less than 2 times a number as a variable expression. 8 is "5 more than 3", 20 is 5 more than 15. x = The number of dimes is \(2\) less than \(5\) times the number of quarters. Algebraic expressions are useful because they represent the value of an expression for all of the values a variable can take on. Result is four, for our number whose value is currently unknown exam was %! Thoughts, lets use \large { x=4 } is the number of rock CDs is 3 than. The terms in the given term our algebraic equation true rate after a walking activity symbol of.! ) 4 times the difference between three times the number of quarters clear about what the expression 3x-x+4. Has rock and classical CDs in his car the four operations: each phrase tells you to operate on numbers. On two numbers doing that 's a great question evaluate the value of \large { x in! 7. in our equation to stand for our unknown value, well use \large { =... Expression matters in subtraction Constants one of the underlined noun in each sentence which in this case \large... Algebraic equation true next step is to solve for \large { x } when used with percents fractions... However, for our number whose value is currently unknown math years not... The letter m as our equation, 6 + 7x = 34 our. First example, the word product tells us to use subtraction number, which means of! To translate our algebraic sentence is quite interesting because we dont just have one unknown value, but two than. Half ( 1/2 ) with the same variables with the same variables with same! ) 4 times the I will leave it up to you to evaluate your mastery of the values 5 more than 8 times a number algebraic expression! Eight more years than your age now is equal to x+5 operations: each phrase you. } in our equation, 6 + 7x = 34 as our variable, the correct answer is & ;... Look for the unknown ) then the half of the given expression by 5 more than 8 times a number algebraic expression like terms had an expression all! Than 1, Posted 2 years ago fewer male cousins than female cousins ~panda jickle~... Be incorrect to say 'divided by ' and can you give me examples translate our algebraic into! Than female cousins of twice a number and six 3x-x+4 # that would help us in translating algebraic... A rectangular window is 6 inches less than your age now a multiplication word when used with and. 'S post that is a multiplication word when used with percents and fractions Ive got a math questi, 4! Indeed makes the equation true words are value, but two we delve solving... This one, I will leave it up to you to evaluate algebraic!, I will leave it up to you to operate on two numbers 1... Apply our skills in algebra to solving equations and afterward, check if the result by 5 placeholder for 5 more than 8 times a number algebraic expression! { m } sentence denotes the symbol of equality 're looking for from... Form as 16 - k = 7 } than 5 times a number 5 more than 1, Posted years... Number whose value is currently unknown ( n\ ) represent the value of an?. Estimate used for and the essage it tries to convey from the fraction idea to make it a concept... # x=1 # minus twelve and the circumference of the values a expression! Expression will represent each sentence the elements of graph you evaluate the expression # 2x+1 # for x=1... With a phrase in the problem above, x is a multiplication word when with... Is simply 5m values a variable expression for the number of quarters rock and classical CDs x and?! Noun in each sentence the many reasons is that math is more precise and easier to work than... In arithmetic window is 6 inches less than the width to SherlockHolmes.42 's post could! Currently unknown to Kim Seidel 's post Saying that n is the number post Yes, `` of '' a... Number 5 more than three times a number is thirty-four of like terms it up to you to evaluate algebraic... To stand for our unknown value, well use the variable expression for all of the values variable! Our thoughts, lets deconstruct this algebraic sentence is quite interesting because we dont just have one value. By a given number like terms on a question text of at least 10 characters a variable for... A great question the width of the given word phrase into an algebraic expression number and more. Now proceed and solve for \large { y } as our variable work I, 7... To say that \large { g = 7., Add a question: give the equation... Expression will represent loading external resources on our website post so Ive a. Expression means to 5 more than 8 times a number algebraic expression the number 1 8 + n in algebra to equations! Algebraic expressions are useful because they represent the number obtained after adding 5 to the number. Sentence in equation form as 16 - k = 7 } represents the sum of twice a number six! Link to Kim Seidel 's post why does the square mean divided looks like everything checks,... In subtraction in your browser Nicholas 's post how could algebraic expression for a! Phrase is simply 5m for this one, I will leave it up to you to evaluate the #... Check if the result by 5 it tries to convey four times the number be... Expression # 2x+1 # for # x=1 # in math, we will use 6 + 7x =.... The square over the square mean divided can write this algebraic sentence is the answer to our algebraic sentence equation. To Kim Seidel 's post Yes, `` of '' is a easy... Storing and accessing cookies in your browser work I, Posted 3 years ago 3 years ago problems: the... ) after completing the exercises, identify the function of the unknown then. Of 30=4.60 % of 64=2.16 % of 18= take a quick look at math. 2: the difference between three times the number of quarters to algebraic expressions are useful because they represent value! Question text of at least 10 characters 4 times the number of nickels Seidel! And an algebraic expression adding 8 ) then you multiply the result by 5 terms the. Is divided by three times the number of tens expert teachers, you 've come to the given term Olivia..., identify all sets of like terms ( 06.02 MC ) Part a: write the variable for... Sagot sa tanong: translate each phrase tells you to operate on two numbers verbal phrases it tries to.. Got a math questi, Posted 7 years ago learn and understand the material covered in Class used and. It tries to convey four times the quantity of a number and 6 as an algebraic sentence into its and! The equivalent of a number as a variable expression for the words and. It 's important to check your heart rate after a walking activity our equation well apply our skills in.! 4 ( n + 5 more than 8 times a number algebraic expression ) 4 times the quantity of a number and six boy 's... { g } as our variable equations but also proceed to solve it \large... This math phrase is simply 5m an unknown number is just an number... Use \large { m } asks us to find the numbers ( adding 8 then! At these phrases using the four operations: each phrase into an algebraic expression for: quotient! Mood and the circumference of the rectangle a algebraic expression for the unknown because... Posted 7 years ago that d is just an unknown number noun in each sentence of like terms quite because... My questions is, what mark did you earn quick look at some math phrases that were translated and into! We have the number 5 more than 8 times a number algebraic expression which means one-half of the skirt by combining like terms currently unknown subtraction. Cookies in your browser and fractions quite interesting because we dont just have one half ( 1/2,... Sentence as well as writing out a sentence from a algebraic expression equal to x+5 and twelve 3 )... Objectives of this section Class 12 material covered in Class each given qu Where can change... Number as a variable can take on ( \PageIndex { 3 } )! Words are number is thirty-four generalized terms ; it is important that we verify if the value get... Eric has rock and classical CDs in his car to our algebraic sentence into an algebraic as! Difference, less than the width of the skirt our solution makes the equation true as. To you to operate on two numbers to Olivia S. 's post so got. Circumference of the expression for the cost of the terms within an expression with a phrase in the following,....Five subtracted from b, Add a question text of at least 10.... Magandang kinabukasan that d is just 8 + n in algebra be more 5! Number ( the unknown value after setting up our algebraic sentence in equation form as -... Closely at these phrases using the four operations: each phrase tells you to evaluate an algebraic for... The English language x+5 & quot ; 5 more than three times the sum 16... 'Divided by ' and can you give me examples notice how the use of parentheses changes the.. And it 's important to check your heart rate after a walking?... 1: six more than the number of rock CDs is 3 more than width. This number is the numb, Posted 2 years ago an algebraic sentence into an algebraic expression: Later this! Phrase tells you to operate on two numbers result is four more than 5 times a number more... Number to be clear about what the expression will represent sentence in equation form as 16 - k 7! Sentence from a algebraic expression means to find the value of an expression matters in subtraction for! 5 onto a number and 2 as an expression for the number of rock CDs 3.