6 Unit 4 Review

Which expression is equivalent to 36 + 24?

• 6+4

• 4(6+4)

• 4(6+6)

• 12(3+2)

Adam is n years old. Mary Beth is 3n+ 4 years old. If Adam is 9 years old, how many years old is Mary Beth?

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Select the THREE expressions that are equivalent to 12x + 8y.

• 12(x + 8y)

• 6x + 6x + 4y + 4y

• 4(3x + 2y)

• 2(12x + 4y)

• 5x + 3x + 3x + x + 6y + y + y

Given 5(4x - 3), which expression is equivalent?

• 20x - 3

• 20x - 15

• 4x - 15

• 9x - 8

Harriet has $25 in her savings account. She will add $5 each week and not take any money out of her account. Which expression represents the amount of money in her savings account after x weeks?

• 25x + 5

• 5x + 25

• 25(x + 5)

• 5(x + 25)

Given 8(x + 3), which expressions are equivalent?

• 8x + 24

• 8x + 3

• 6(x + 3) + 2x

• 3x + 24 + 5x

• 4(x + 6) + 4x

Scott works on cars. He charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie's car bill was $63.

• 7x + 35 = 63
• 7x = 63
• 7x - 35 = 63
• 35x + 7 = 63