Find the point of intersection of the two lones y=3x+2 and y=2x-1

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

What percent of the circle below is shaded?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).