28! hope this helps, you just plug in 4 for x, and then multiply by two.
Answer:
The length of side is 42.4 inches.
Step-by-step explanation:
Given that:
Diagonal of square = 60 inches
As all sides of a square are equal, thus
Side of square = x
The diagonal will be the hypotenuse of a right angled triangle.
Using Pythagorean theorem;

Taking square root on both sides

Hence,
The length of side is 42.4 inches.
660 divided by 2 and it gives you your answer of 13.2
So therefore the answer is 13.2 per hour
2(x4) = 35 - (7-4x)
+4x
2(x8)= 28
/2 /2
8x = 14