Question

add. (9z + 2) + (7z + 2)

Explanation:

Step1: Remove parentheses

Since there is a plus sign before each parenthesis, the terms inside remain the same. So we have $9z + 2+7z + 2$.

Step2: Combine like - terms

Combine the $z$ terms and the constant terms. $(9z+7z)+(2 + 2)=16z+4$.

Answer:

$16z + 4$