What is the value of x? round your answer to the nearest tenth if necessary.

right triangle whose two legs measure seven and four, and whose hypotenuse is x

We know that to find the sides of a right triangle we can use the Pythagorean theorem: A^2 + B^2 = C^2.

Plugging in our sides into the equation:
7^2 + 4^2 = x^2
49 + 16 = x^2
65 = x^2
x = 8.06

Rounding x to the nearest tenth, we get x = 8.1