Question

1. the area of a square photo is 9 square inches. how long is each side of the photo?

Explanation:

Step1: Recall area formula for square

The area formula for a square is $A = s^2$, where $A$ is the area and $s$ is the side - length.

Step2: Solve for side - length

Given $A = 9$ square inches, we have $s^2=9$. Taking the square root of both sides, $s=\sqrt{9}$. Since the side - length of a square cannot be negative, $s = 3$ inches.

Answer:

3 inches