AnswersCommon Core Math 7 - MA3107 CRPercent Increase and Decrease

Writing Expressions Answers

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Which real-world scenario can be described by the algebraic expression 4w?

A
withdrawing w dollars from the bank and giving 4 dollars to a friend
B
buying w items that cost $4 per item
C
buying w items and dividing them among 4 friends
D
buying w items and giving 4 of them to a friend
2
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Which real-world scenario can be described by the algebraic expression ?

Question illustration
A
buying pizzas and giving 8p pizzas to each of 8 friends
B
buying 8 pizzas each of which has p slices
C
buying p pizzas and giving 8 slices to a friend
D
buying p pizzas and dividing them among 8 people
3

Which phrases can be represented by the algebraic expression x + 14? Select three options.

A
the quotient of a number and 14
B
a number plus 14
C
fourteen less than a number
D
fourteen more than a number
E
a number increased by 14
4

Which expression represents the algebraic phrase “twelve times the sum of a number and seven-tenths”?

A
12 y + StartFraction 7 over 10 EndFraction
Option A
B
12 (y + StartFraction 7 over 10 EndFraction)
Option B
C
StartFraction 7 over 10 EndFraction y + 12
Option C
D
y (StartFraction 7 over 10 EndFraction + 12)
Option D
5

Which phrase describes the algebraic expression ?

Question illustration
A
the sum of three times a number and four
B
four less than three times a number
C
the quotient of three times a number less four
D
the difference between four and three
6

Which phrase describes the algebraic expression ?

Question illustration
A
21.5 decreased by x
B
x more than 21.5
C
21.5 minus x
D
x less 21.5
7

Which phrases can be represented by the algebraic expression ? Select three options.

Question illustration
A
12 divided by a number
B
the quotient of 12 and a number
C
a number divided by 12
D
a number divided into 12
E
the product of 12 and a number
8

Which phrase describes the algebraic expression ?

Question illustration
A
the quotient of a number and 15
B
the product of a number and 15
C
the sum of a number and 15
D
15 divided by a number
10

Which expression represents the algebraic phrase “the sum of negative three-eighths and four times x minus nine times z”?

A
Negative 9 z (Negative StartFraction 3 over 8 EndFraction + 4 x)
Option A
B
Negative StartFraction 3 over 8 EndFraction (4 x minus 9 z)
Option B
C
Negative StartFraction 3 over 8 EndFraction + 4 x minus 9 z
Option C
D
Negative StartFraction 3 over 8 EndFraction minus 4 x + 9 z
Option D

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