AnswersCrowley Credit Recovery College Prep Math AUnit Test

Expressions with Unknowns Answers

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1
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Which expression can be used to model the statement “On Wednesday, Nathaniel earned $10 less than he earned on Tuesday”?

A
n + 10
Option A
B
10 minus n
Option B
C
n minus 10
Option C
D
10 less-than n
Option D
2
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Which statement could the expression represent?

Question illustration
A
one point greater than the last test grade
B
the difference of Gina’s score and one
C
the total cost less one dollar
D
one minute less than Mickey’s previous time
3

Which statement could the expression represent?

Question illustration
A
Andrea has 13 eggs and bought 13 more.
B
Victoria has 13 flowers. This is greater than the number of flowers Elisa has.
C
Prakhar is 13 years older than his youngest sister.
D
Kai is 13 blocks from home. Jack is a greater distance away.
4

Which set of algebra tiles represents the sentence below?Luis added four shells to his collection.

A
1 box contains x and 4 boxes contain minus signs.
Option A
B
4 boxes contain x and 1 box contains a plus sign.
Option B
C
1 box contains x and 4 boxes contain a plus sign.
Option C
D
4 boxes contain x and 1 box contains a minus sign.
Option D
5

Jillian was asked to translate the expression into words. She wrote “a number increased by nine.” Which best describes the accuracy of Jillian’s answer?

Question illustration
A
It is incorrect. The variable would come first in the expression “a number” (n) “increased by” (+) “nine” (9).
B
It is incorrect. The phrase “increased by” refers to the inequality symbol “greater than” (>), not addition.
C
It is correct. A number increased by nine () is the same as nine increased by a number ().
Option C
D
It is incorrect. A number increased by nine refers to a multiplication expression ().
Option D
6

Kelley writes the expression to model the phrase “Xander studied two more hours than Nandini.” Which best explains the accuracy of Kelley’s expression?

Question illustration
A
It is accurate. In the phrase “two more hours than Nandini,” “two” is “2,” “more” is “+,” and Nandini’s study time is unknown or “n,” so or are correct translations.
Option A
B
It is inaccurate. In the phrase “two more hours than Nandini,” “two” is “2,” “more” is “+,” and Nandini’s study time is unknown or “n,” so is the correct translation.
Option B
C
It is inaccurate. In the phrase “two more hours than Nandini,” “two” is “2,” “more than” is “>,” and Nandini’s study time is unknown or “n,” so is the correct translation.
Option C
D
It is inaccurate. In the phrase “two more hours than Nandini,” “two” is “2,” “more than” is “<,” and Nandini’s study time is unknown or “n,” so is the correct translation.
Option D
7

Which set of algebra tiles represents the sentence below?Carlton earned 3 more stamps.

A
1 box contains x and 3 boxes contain plus signs.
Option A
B
1 box contains x and 3 boxes contain minus signs.
Option B
C
3 boxes contain x and 1 box contains a plus sign.
Option C
D
3 boxes contain negative x and 1 box contains a plus sign.
Option D
8

Which steps can be taken to translate the phrase “the difference in the number of servings and four”? Check all that apply.

A
Replace “the difference” with subtraction.
B
Replace “the number of servings” with a variable, x.
C
Replace “four” with 4.
D
Replace “the difference” with addition.
E
Write the expression .
Option E
F
Write the expression .
Option F
9

Which are correct interpretations of the expression ? Check all that apply.

Question illustration
A
5 more than a number
B
the sum of a number and 5
C
the difference of a number and 5
D
5 less than a number
E
5 is greater than a number
F
the total of a number and 5
10

Which is a correct representation of using algebra tiles?

Question illustration
A
5 boxes contain x.
Option A
B
5 boxes contain plus signs.
Option B
C
5 boxes contain x and 1 box contains a plus sign.
Option C
D
5 boxes contain a plus sign and 1 box contains x.
Option D
11

Which expression can be used to represent the phrase “Maren increases the number of servings by six”?

A
n minus 6
Option A
B
6 minus n
Option B
C
n + 6
Option C
D
6 n
Option D
12

Which expression can be used to represent the phrase “Lamar decreased his collection of cards by seven”?

A
x minus 7
Option A
B
7 minus x
Option B
C
x + 7
Option C
D
7 x
Option D
13

Which expression can be used to model the phrase “the sum of three and a number”?

A
3 + x
Option A
B
x minus 3
Option B
C
3 minus x
Option C
D
x times 3
Option D
14

Which steps can be taken to translate the phrase “the height of a tree is increased by seven inches” into an algebraic expression? Check all that apply.

A
Replace “the height of a tree” with a variable, x.
B
Replace “seven inches” with a variable, x.
C
Replace “increased by” with an addition symbol.
D
Replace “seven inches” with 7.
E
Replace “increased by” with a multiplication symbol.
F
Replace “the height of a tree” with 7.
G
Write the expression .
Option G
H
Write the expression .
Option H

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