Jenny simplified the expression 7x + 5y + 4(x – y) – 6 and listed the Number Properties used:

c) Redo the problem correctly.
Justify each step using the
correct Number Property. (2 points)
Jenny’s Work Number Property Used
7x + 5y + 4(x – y) – 6 Given
1) 7x + 5y + 4x – y – 6 Distributive Property
2) (7x + 4x) + (5y – y) – 6 Associative Property of Addition
3) 11x + 4y – 6 Combine Like Terms
a) Circle the mistake(s) that Jenny made. Describe what
she did incorrectly. What should she have done?
There may be more than one mistake! (2 points)
b) Name one thing she did correctly. (1 point)

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