Expressions and Equations

Here is an expression: 3⋅2^t. Evaluate the expression when t is 1.

• 6

• 63

• 4

• 5

• A

• B

• C

• D

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

Mai poured 2.6 liters of water into a partially filled pitcher. The pitcher then contained 10.4 liters. How much water did the pitcher contain before Mai added more water?

• 13 liters

• 7.8 liters

• -7.8 liters

• 12 liters

Solve:
7x - 3x - 8 = 24

• 8

• -8

• 3.2

• 4

Which value of x makes 2 ( x - 4) + 3 = 7 a true statement?

• 1

• 4

• 6

• 7