Question

add.
(2y + 9) + (6y - 1)

Explanation:

Step1: Remove parentheses

$(2y + 9) + (6y - 1) = 2y + 9 + 6y - 1$

Step2: Combine like terms (y terms)

$2y + 6y + 9 - 1 = 8y + 9 - 1$

Step3: Combine constant terms

$8y + (9 - 1) = 8y + 8$

Answer:

$8y + 8$