Answer:
sqrt(65) =x
Explanation:
This is a right triangle so we can use the Pythagorean theorem
a^2 +b^2 = c^2 where a and b are the legs and c is the hypotenuse
4^2 + 7^2 = x^2
16+49 = x^2
65 = x^2
Take the square root of each side
sqrt(65) =sqrt(x^2)
sqrt(65) =x