Which expression in equivalent to -3 1/8 - 2 1/2

Asap will give brainliest and a lot of points

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*