Expressions and Equations Review

Here is an expression: 3⋅2^t.

Evaluate the expression when t is 4.

• 72

• 24

• 48

• 10

2/9 of the students in a school are in sixth grade. If the school has x students, write an expression for the number of sixth graders in terms of x.

• 2/9 ÷ x

• 2x

• 2/9 ⋅ x

• 9x

2/9 of the students in a school are in sixth grade. How many students are in the school if 42 of them are sixth graders?

• 44

• 51

• 189

• 9 1/3

Jada makes sparkling juice by mixing 2 cups of sparkling water with every 3 cups of apple juice. Let s represent the number of cups of sparkling water and j represent the number of cups of apple juice. Write an equation that shows how s and j are related.

• j = 2/3 ⋅ s

• j = s + 2

• j = 3/2 ⋅ s

• j = s − 3

Mai poured 2.6 liters of water into a partially filled pitcher. The pitcher then contained 10.4 liters. Write an equation that represents this situation.

• x − 2.6 = 10.4

• x + 2.6 = 10.4

• 2.6 + 10.4 = x

• 2.6 = 10.4 + x

Solve:
7x - 3x - 8 = 24

• 8

• -8

• 3.2

• 4

What is 12 ⋅ 12 ⋅ 12 ⋅ 12 written as a exponent

• 12⁴

• 12 ⋅ 4

• 4¹²

Use the distributive property to simplify 2(x + 4)

• 2x + 4

• 2x + 8

• 10x

• x² + 8

Evaluate using correct order of operations

12 - 2 ⋅ 4

• 4

• 46

• 40

Use the distributive property to simplify the expression 2x + 3(x - 1)

• 5x - 3

• 5x - 1

• 2x

• 5x + 3