What is the value of x ??

What properties allow transformation to be used as a problem solving tool

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

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).