Need help with algebra homework

127.3

Step-by-step explanation:

The formula you gave is is known as the Pythagorean Theorem.

It is used to find the hypotenuse (longest side) of a right triangle with the lengths of the other two legs (sides).

Here, a is the hypotenuse of two adjacent triangles. Both triangles are right triangles, and have legs (not including the hypotenuse) of 90 ft.

Now, the formula is a^2 + b^2 = c^2.

A and b are the two shorter legs of the triangle: 90 and 90. Let's insert these values into the formula.

90^2 + 90^2 = c^2

90^2 is 8100, and 8100 plus 8100 is 16200.

16200 = c^2 (c is the hypotenuse, or a)

Now, we just have to find the square root of 16200.

sqrt16200=127.27

When we round this to the nearest tenth, we get 127.3.