Writing and Evaluating Expressions

When x = 10, the value of 2x - 12 is ?

• 4

• 5

• 8

• 2

Evaluate 5x - 8y if x = 3 and y = 9

• -57

• -37

• -28

• -67

When x = 4 and y = 2, which expression is equal to 30?

• 6x + 2y

• 5x + 5y

• 4x + 5y

• 5x + 4y

Simplify the expression  $20\div5+13-7$  

• 11

• 12

• 15

• 10

Jamie buys some hats that cost $4 each and 2 bags that cost $12 each. The total cost of the purchase $32. Determine the equation that matches the scenario.

• 4n + 12 = 32

• 2n + 48 = 32

• 4n + 24 = 32

• 4n + 2 = 32

 $\frac{x}{2}-7=6$  

What is the correct method in solving the equation?

• Adding 7 to both sides and then dividing by 2.

• Subtracting 7 from both sides and then multiplying by 2.

• Subtracting 7 from both sides and then dividing by 2.

• Adding 7 to both sides and then multiplying by 2.

Which number is the solution of x - 14 = 8

• 23

• 22

• 25

• 21

 $20=f-6$  

Solve

• 14

• 23

• 28

• 26

 $\left(-2\right)\left(\frac{3}{-7}\right)$  

Which expressions are equivalent to the above problem.  Select all that apply.

•  $\frac{6}{7}$  

•  $\frac{2}{7}\left(3\right)$  

•  $\frac{-6}{-7}$  

• They are all right

•  $\left(-2\right)\left(3\right)\left(-\frac{1}{7}\right)$  

What is the definition of additive inverse?

• What you add to a number to get 0.

• What you add to a number to get 1.

• What you add to a number to get -1.