Question

11 and 15 pleaseeeeeeeeee

Answer 1

You were on the right track for 11. You just needed to find the square root of 9 which is 3. And for 15 you square both sides and the answer would just be the square root of 77 since it's not a perfect square and it can't be broken down anymore.

Answer 2

11. The formular for finding the area of a square is
A = (a)squared
Since we are finding the length of each the sides we make a the subject
A = (a)squared
√A =√(a)squared
a = √A
Given A = 9
a =√9
a =3
Therefore each side of tne photo is 3inches


15. (b)squared = 77
To make b the subject we square root both sides of the equation.
√(b)squared =√77
b = 8.774964384