Samantha has a total of twelve $1 and $5 bills in his purse. She has 5 times as many $5 bills as $1 dollar bills. Write a system of equations to model the problem. Then solve the system algebraically. How many of each bill does Samantha have?

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

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