Should I give free points technically I'm doing it rn do u play animal jamm

Which best explains why this triangle is or is not a right triangle?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .