AnswersPre-Algebra A-CRWriting and Evaluating Expressions

Writing and Evaluating Expressions Answers

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Henry divided his socks into five equal groups. Let s represent the total number of socks. Which expression and solution represent the number of socks in each group if ?

Question illustration
A
; when , the number of socks in each group is 4.
Option A
B
; when , the number of socks in each group is 15.
Option B
C
; when , the number of socks in each group is 4.
Option C
D
; when , the number of socks in each group is 15.
Option D
2
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Kalinda is 68.7 inches tall and wants to know how many inches taller she is than Terrence. If t represents Terrence’s height in inches, which expression can she use to find the answer?

A
68.7 minus t
Option A
B
StartFraction t Over 68.7 EndFraction
Option B
C
StartFraction 68.7 Over t EndFraction
Option C
D
t minus 68.7
Option D
3

Fiona doubled the original amount in her savings account, s. Which expression represents her new balance and what is that new balance if ?

Question illustration
A
; when the new balance in Fiona’s savings account is $80.
Option A
B
; when the new balance in Fiona’s savings account is $320.
Option B
C
; when the new balance in Fiona’s savings account is $320.
Option C
D
; when the new balance in Fiona’s savings account is $80.
Option D
4

The height of Sonji’s picture frame is 18 inches. Part of the height is from the matting. Sonji wants to know the height of a picture that will fit in the remaining height of the frame. If m represents the height of one side of the matting, which expression represents the height of the opening for the picture?

Question illustration
A
StartFraction 18 Over m EndFraction
Option A
B
StartFraction 2 m Over 18 EndFraction
Option B
C
18 minus 2 m
Option C
D
m minus 18
Option D
5

Which scenario could be represented by the algebraic expression ?

Question illustration
A
Ariel wants to find the difference of a number and 13.
B
Ariel wants to find the product of 13 and a number.
C
Ariel wants to find the sum of a number and 13.
D
Ariel wants to find the difference of 13 and a number.
6

Joe told Mickey he got an hourly raise at work and his new rate will be $10.25 per hour. Mickey wants to know what Joe’s hourly rate was before his raise. If r represents the amount of the raise, which expression represents Joe’s hourly rate before his raise?

A
r minus 10.25
Option A
B
10.25 minus r
Option B
C
10.25 + r
Option C
D
r + 10.25
Option D
7

Salina’s age is one-quarter the age of her aunt. If a represents her aunt’s age, which expression represents Salina’s age?

A
4a
B
a minus 4
Option B
C
a + 4
Option C
D
StartFraction a Over 4 EndFraction
Option D
8

Sandra rode her bike 5 times as many miles as Barbara. If b, the distance Barbara rode, equals 3.4 miles, what is the correct expression and distance Sandra rode?

A
; when the distance Sandra rode is 17 miles.
Option A
B
5b; when the distance Sandra rode is 17 miles.
Option B
C
5b; when the distance Sandra rode is 8.4 miles.
Option C
D
; when the distance Sandra rode is 8.4 miles.
Option D
9

Which algebraic expression represents “the quotient of 7 and a number”?

A
StartFraction 7 Over n EndFraction
Option A
B
7 + n
Option B
C
7 n
Option C
D
7 minus n
Option D
10

Which scenario could be represented by the algebraic expression ?

Question illustration
A
Barb wants to divide a number by the days in a year.
B
Barb wants to multiply the days in a year by a number.
C
Barb wants to divide the days in a year by a number.
D
Barb wants to add the days in a year and a number.

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Writing and Evaluating Expressions Answers…