Unit 6 Expressions and Equations

Which expression is equal to 4³?

• 7

• 12

• 3⁴

• 4 ⋅ 4 ⋅ 4

Select all the equations where x = 5 is a solution.

• x − 5 = 0

• 1 + x = 4

• 10 = 2x

• 9 − x = 5

• x² = 25

Which expression is equivalent to 15c − 6d?

• 3(5c + 2d)

• 3(5c − 6d)

• 3(5c − 2d)

• c(15 − 6d)

Here is an expression: 4 ⋅ 3^t.

Evaluate the expression when t is 1.

• 12

• 8

• 4

• 7

Here is an expression: 4 ⋅ 3^t.

Evaluate the expression when t is 2.

• 72

• 24

• 36

• 12

2/5 of the students in a school are in sixth grade. How many sixth graders are there if the school has 100 students?

• 10

• 40

• 20

• 125

2/5 of the students in a school are in sixth grade. How many sixth graders are there if the school has 20 students?

• 4

• 54

• 8

• 100

2/5 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.

• 2/5 ÷ x

• 2x

• 2/5 ⋅ x

• 5x

2/5 of the students in a school are in sixth grade. How many students are in the school if 74 of them are sixth graders?

• 44

• 142

• 185

• 9 1/3

Jada makes sparkling juice by mixing 3 cups of sparkling water with every 4 cups of apple juice. How much sparkling water does Jada need if she uses 20 cups of apple juice?

• 9 cups

• 8 cups

• 15 cups

• 27 cups