Which equation is correct? 52 × 7 = 50 × 7 + 2 × 7

52 × 7 = 50 + 2 × 7

52 × 7 = 500 × 7 + 2 × 7

52 × 7 = 50 × 7 + 2

Find the surface area of the prism formed by the net

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

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).