Which pair of numbers is relatively prime? 7 and 21 4 and 15 6 and 9 9 and 27

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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 f(x) = 4x – 3 and g(x) = 8x + 2, find each function value a.f[g(3)] b.g[f(5)] c.g{f[g(-4)]}