Perform the indicated operations.
-7z - 20 - 4z
A)11z + 20
B)3z + 20
C)11z - 20
D)3z - 20

Question

Quizplus · Accepted Answer

To perform this operation we need to add the coefficients of the same variable 'z'.
Here, the coefficients of z are 7 and -4.
So, 7z - 4z = 3z
Next, we need to subtract 20 from the result.
Therefore, 3z - 20
Hence, the correct choice is C, 11z - 20. Combine like terms by adding 7z and -4z which gives 3z. Then, subtract 20 from -20, which equals -40. Thus, the simplified expression is 3z - 20. Therefore, the best choice is option C, which matches the simplified expression.

Perform the Indicated Operations