Question

add.
(3z + 4) + (z + 8)

Explanation:

Step1: Remove parentheses

Since there are no operations outside the parentheses that would change the terms inside (just addition), we can remove the parentheses: \(3z + 4+z + 8\)

Step2: Combine like terms

Combine the \(z\)-terms: \(3z+z = 4z\)
Combine the constant terms: \(4 + 8=12\)
So the simplified expression is \(4z + 12\)

Answer:

\(4z + 12\)