Answer:
8.06
Step-by-step explanation:
From the Pythagorean theorem, x = sqrt(4^2+7^2) which is sqrt(16+49) = sqrt(65) = 8.06
The true answer is actually \sqrt{65}
4^2+7^2=x^2
Switch sides: x^2=4^2+7^2
After everything is squared: x^2=16+49
So..x^2=65 OR \sqrt{65}
