Unit 4 Review

Is Jessica correct in saying 30² = 60?

• Yes, because 30² is 60.

• No, because 30² is 900.

• Yes, because 30 + 30 is 60.

• No, because 30 × 2 is 60.

Evaluate (1/2)³.

• 1/8

• 1/4

• 1/6

• 1/2

What is the factored expression for the model given in the diagram?

• 9(3.50 + x)

• 3.50(9 + x)

• x(9 + 3.50)

• 9x + 3.50

Write an equivalent multiplication expression for x + x + 3x + x + 3x + x.

• 10x

• 9x

• 8x

• 7x

Evaluate 10x when x = 3.

• 30

• 33

• 36

• 39

What is the result of Melissa's expression: (18 + 36) ÷ 6 + 3²?

• 21

• 18

• 27

• 24

What is the result of Saul's expression: 18 + (36 ÷ 6) + 3²?

• 33

• 18

• 21

• 24

What is an expression that shows the sum of exactly two terms equivalent to 7(2a+3b)?

• 14a + 21b

• 14a + 3b

• 2a + 21b

• 7a + 3b

What is the factor of 32a + 18b?

• 2(16a + 9b)

• 4(8a + 4.5b)

• 8(4a + 2.25b)

• 2(8a + 9b)

Expand 5(3x + 2).

• 15x + 10

• 15x + 2

• 5x + 10

• 3x + 10