Equations and Expressions

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

• 6

• 63

• 4

• 5

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. How many sixth graders are there if the school has 27 students?

• 3

• 54

• 6

• 121.5

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

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

Solve for x. 
x + 4 = 14

• 4

• 14

• 10

• -4

Solve for p. 
p + 22 = 66

• 40

• 44

• 22

• 42

Solve for x:

• x = 20

• x = 7

• x = 10

• x = 3

Which expression represents this phrase?

five times the sum of nineteen and a number k

• 5(19k)

• 5(19) + k

• 5 + 19k

• 5(19 + k)

How many terms are in the expression?

6(4x) + 3y - 12x + 5(3x)

• 2

• 3

• 4

• 6