Find the arc length of the partial circle

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x