John has us and foreign stamps in his album. the ratio of the number of us stamps to foreign stamps is 5:2. after paul gives him 12 foreign stamps, the ratio becomes 2:1. find the number of us stamps he has.

The graph below shows the price of different numbers of mats at a store: a graph is shown. the values on the x axis are 0, 2, 4, 6, 8, 10. the values on the y axis are 0, 21, 42, 63, 84, and 105. points are shown on ordered pairs 0, 0 and 2, 21 and 4, 42 and 6, 63 and 8, 84. these points are connected by a line. the label on the x axis is number of mats. the title on the y axis is price in dollars. which equation can be used to determine p, the cost of b mats?

Find the missing factor in exponential form 48^2=3^2 • ?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12