If 4 + x = −3 + 2x, then 9x =?

Given right triangle xyz, which correctly describes the locations of the sides in relation to

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points