An ATM machine issues $10 and $20 notes only. On a particular day 66 notes had been issued, for a total value of 8970. Two simultaneous equations that can be obtained from this information are: 1+1=66
10x +20y =970
(a) What do r and y represent in these equations?
(b) Solve the equations to work out how many of each kind of note were issued​

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.