Factor each expression
(9 & 10)

Which math sentence can be used to determine if the triangle is a right triangle?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

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).