AnswersPre-Algebra A-CRExpressions with and without Parentheses

Expressions with and without Parentheses — Unit test Answers

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

Question illustration
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
2
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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
3

Jayme built a box in the shape of a rectangular prism with the dimensions shown. What is the volume of the box, in cubic inches?Use the formula , where V represents the volume, l represents the length, w represents the width, and h represents the height.

Answer not available
4

Which expression correctly represents “eight times the difference of four and a number”?

A
8 (n minus 4)
Option A
B
8 (4 minus n)
Option B
C
8 (n) minus 4
Option C
D
8 (4) minus n
Option D
5

Which set of algebra tiles represents the sentence below?Ada drove 2 fewer miles today than she drove yesterday.

A
2 boxes contain negative x and 1 box contains a plus sign.
Option A
B
1 box contains x and 2 boxes contain a minus sign.
Option B
C
1 box contains negative x and 2 boxes contain plus signs.
Option C
D
2 boxes contain x and 1 box contains a minus sign.
Option D
6

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
7

Which situations can represent the expression ? Check all that apply.

Question illustration
A
Ramya’s grade increased by two points
B
the difference between Escher’s highest score and two
C
the number of chapters Wally read plus two more
D
two fewer than the maximum number of absences Ellie is allowed
E
two added to Allison’s age.
F
the sum of Mikel’s height and two
8

Which expression is represented by the set of algebra tiles below?

Question illustration
A
x + 6
Option A
B
x minus 6
Option B
C
6 minus x
Option C
D
6 x minus 1
Option D
9

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

Question illustration
A
1
B
5
C
7
D
12
10

What is the height of a triangle which has a base of 8 centimeters and an area of 16 square centimeters?Use the formula , where A represents the area of the triangle, h represents the height, and b represents the length of the base.

Question illustration
A
One-half centimeters
Option A
B
1
Option B
C
2
Option C
D
4
Option D
11

A sheet of origami paper is in the shape of a square with a side length of 7 inches, as shown. What is the area of the sheet of origami paper?Use the formula for the area of a square, , where A represents the area and s represents the side length.

Question illustration
A
14
Option A
B
28
Option B
C
49
Option C
D
98
Option D
12

Dominick drew a triangle on a map connecting his house, his school, and his favorite skate park. He used a scale on the map to determine that the height of the triangle that he drew represented 2 miles, and the base of the triangle that he drew represented 6 miles. What is the area of the triangle in square miles?Use the formula for the area of a triangle, , where A is the area of the triangle, b is the base, and h is the height.

Question illustration
Answer not available

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