4.5 Week Test Review

Catherine wrote the first step in solving an equation.

                              3x - (x - 5) = 9
                  Step 1: 3x - x + 5 = 9

Which property justifies this step?

• Commutative Property of Addition
• Distributive property
• Identity property of addition
• Associative property of addition

What property is illustrated by the equation

              3x = x 3 ?

• Symmetric property of equality
• Commutative property of addition
• Associative property of multiplication
• Commutative property of multiplication

Which property guarantees that the second equation is equivalent to the first?

                6x + 7 = 15
                7 + 6x = 15

• Additive inverse property
• Associative property of addition
• Commutative property of addition
• Distributive property

What property is illustrated by the equation

                   (3 + 5) + 2 = 3 + (5 + 2) ?

• Associative property of multiplication
• Associative property of addition
• Commutative property of addition
• Substitution property of equality

Mary’s hourly rate at McDance is 4 more dollars than twice John’s hourly rate. If j represents John’s hourly rate, which expression describes Mary’s hourly rate?

• 2j + 4
• 4j - 2
• 4j + 2
• 2j - 4

• 9
• 5
• 10
• 16

• -14
• -6
• 18
• 26

Given the expression “twice the sum of a number and three“, what is the value of the expression if the number is equal to -5?

• -2
• -7
• -4
• 4

What value of x makes the equation true?

               3( x - 2) = -6

• 4/3
• 0
• -4
• 4

• 0
• 4
• 14
• 18