Name________________________

EVALUATING EXPRESSIONS #2--KEY

Directions: Evaluate the expressions below when x = -4 and y = 7. That means you should substitute a 4 in place of any x’s in the expression and substitute a 7 in place of any y’s. After that, follow the standard order of operations to find the value of the expression. Write that value in the space provided.

Examples: x + 2y 3(x + y) 6y + 2x + 3

-4 + 2(7) 3 (-4 + 7) 6(7) + 2(-4) + 3

-4 + 14 3(3) 42 + (-8) + 3

10 9 37

1) xy = ___-28___ 2) x + y = ___3___

3) 5x + 3 = ___-17___ 4) 2y - 8 = ___6___

5) 2x + 2y = ___6___ 6) 4(x+y) = ___12___

7) -y + 2 = ___-5___ 8) 2y + 2x = ___6_____

9) 2x + 4x + 11 = ___-13_____ 10) 40 – 3y + -x = ___23____