Solve the system by substitution. 5x+y=−17 −3x−3y=3

Which statement justifies why angle ebc measures 90?

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

Find the value of x. round the length to the nearest tenth