Verified Answer :

Neopolitan

You're basically multiplying the number and the variable with the number on the outside of the parenthesis.  

So, 8(x + 7). You multiply 8 and the variable to get 8x. The same with '7'.
8 times 7 is 56.

Answers:

A) 8x + 56

B) 66 + 6x

C) 8x + 8

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