AnswersSS-Math 7Adding and Subtracting Expressions

Adding and Subtracting Expressions — Unit test Answers

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1
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What is the value of the expression when n = 12?

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A
1
B
5
C
7
D
12
2
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Which expression is represented by the set of algebra tiles below?

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A
x + 6
Option A
B
x minus 6
Option B
C
6 minus x
Option C
D
6 x minus 1
Option D
3

Otero translated the phrase “three less than a number” into the expression . Which best describes the accuracy of Otero’s expression?

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A
It is accurate. The phrase can be translated as “three” = 3, “less than” = subtraction, and “a number” = x, so is the correct expression.
Option A
B
It is inaccurate. Three is being subtracted from a number, so is what he should have written.
Option B
C
It is inaccurate. Three is being compared to a number, so is what he should have written.
Option C
D
It is inaccurate. Three is being added to a number, so is what he should have written.
Option D
4

Collin is substituting and to determine if the two expressions are equivalent. Which statement is true?

Question illustration
A
Both expressions are equivalent to 11 when .
Option A
B
Both expressions are equivalent to 33 when .
Option B
C
Both expressions are equivalent to 23 when .
Option C
D
The expressions are not equivalent.
5

What is written in expanded form?

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A
4 + 4 + 4 + 4 + 4 + 4
Option A
B
4 times 4 times 4 times 4 times 4 times 4
Option B
C
6 + 6 + 6 + 6
Option C
D
6 times 6 times 6 times 6
Option D
6

What is the correct expanded form and value of ?

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A
One-fifth + one-fifth + one-fifth + one-fifth = StartFraction 4 Over 5 EndFraction
Option A
B
One-fifth times one-fifth times one-fifth times one-fifth = StartFraction 1 Over 625 EndFraction
Option B
C
StartFraction 1 + 1 + 1 + 1 Over 5 times 4 EndFraction = StartFraction 4 Over 20 EndFraction
Option C
D
One-fifth times 4 = StartFraction 4 Over 5 EndFraction
Option D
7

Which description is paired with its correct expression?

A
two less than the quotient of a number cubed and four, increased by eight;
Option A
B
six times the difference of five and a number squared;
Option B
C
three more than the quotient of nine and a number cubed, decreased by two;
Option C
D
twice the difference of a number squared and three;
Option D
8

What is the value of the expression “three less than the quotient of ten and a number, increased by six” when n = 2?

A
2
B
mc022-4.jpg
Option B
C
8
D
mc022-5.jpg
Option D
9

What is the value of the expression ?

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Answer not available
10

Which scenario could be represented by the algebraic expression ?

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A
Ahmed wants to know how much money he would make after 12 hours of work.
B
Ahmed wants to know the height of a building if each floor is 12 feet high.
C
Ahmed wants to know how many half-inch pieces are in a foot.
D
Ahmed wants to know how many floors are in an office building when each floor is 12 feet high.
11

Muriel translated the phrase below into an algebraic expression and then evaluated it for . the product of a number and 8Which of the following contains the correct expression and value?

Question illustration
A
8 + n = 12
Option A
B
StartFraction 8 Over n EndFraction = 2
Option B
C
8 n = 32
Option C
D
8 minus n = 4
Option D
12

Noni is looking for the sum of a number, n, and 21.What is the sum Noni is looking for if ?

Question illustration
Answer not available
13

Which facts could be applied to simplify this expression? Select three options.

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A
To subtract like terms, subtract the coefficients, not the variables.
B
Like terms are terms that contain the same variable, raised to the same power.
C
The simplified expression is .
Option C
D
The simplified expression is .
Option D
E
is equivalent to , so .
Option E
14

Which statements are true about the expression ? Check all that apply.

Question illustration
A
To simplify, distribute a to 8 and to 7.
B
8(a) can be rewritten as 8a.
C
can be rewritten as .
Option C
D
can be rewritten as .
Option D
E
An equivalent expression is 15a.
F
An equivalent expression is
Option F
G
An equivalent expression is
Option G
15

Which expression is equivalent to ?

Question illustration
A
4 x minus 7 y
Option A
B
4 x minus 3 y
Option B
C
4 x + 3 y
Option C
D
4 x + 7 y
Option D

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