Question

3 please help me pls

Answer 1

The answer is 7.48.

Explanation:

`c^(2) - b^(2)` =
`a^(2)`

`15^(2) - 13^(2) = a^(2)`

`225 - 169` =
`a^(2)`

`56 = a^(2)`

`√(56) = \sqrt{a^(2) }`

`7.48 = a`

Answer 2

Answer: x=7.48 im positive