Question

the answers to that $y 2 - 1 = 9$

Answer 1

You have the following equation:

y/2 - 1 = 9

in order to solve the previous equation, proceed as follow:

y/2 -1 = 9 add 1 both sides

y/2 = 9 + 1 simplify

y/2 = 10 multiply by 2 both sides

y = 20

Hence, the solution for y is y = 20

B. 20