Evaluate expression below if t=3
2t+7-t+1

Flashback to semester a. are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr? show your work.

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11