Write the correct equation and solve. use x for the variable. the difference of four times a number and seven is thirteen

Step-by-step explanation:

Let the number be x

4times a number  =4x

The difference of four times a number and seven : 4x - 7

4x - 7 = 13

      4x = 13 + 7

      4x = 20

        x = 20/4

        x = 5

What is the longest side?

square root of 1700

What is the square of the longest side?

1700

What is the sum of the squares of the two shorter sides?

1700

Does the window frame form right triangles?

Yes, the sum of the square of the two shorter sides equals the square of the longest side.