In a cashbox filled with $1, $5, $10, and $20 bills, there is a total of $400. The number of $5 billswas 4 times the number of $10 bills and the number of $1 bills was 10 more than the number of $10bills. There are four $20 bills. How many bills of each type were in the cashbox?

2

step-by-step explanation:

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answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10