which of the following expressions is equivalent
to 7x + 9y - 6 - 3y + 4?
a 7x + 4y
b 11xy
c 7x + 6y - 2
d. 7x+4

C

Explanation:

All that is needed to do is combine like terms. The sign in front of each term stays with it. Like +9y-3y=6y, 7x would isolate itself since it has not other term to follow. And -6+4=-2. This would all lead to C. 7x+6y-2.

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