
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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(a) Find the total number of solutions.
(b) Find the solution with the smallest number of five-dollar bills.
(c) Find the solution with the largest number of five-dollar bills.

Transcribed Image Text:A bank teller has a total of 74 bills in five-, ten-, and twenty-dollar denominations. The total value of the money is $920.
(a) Find the total number of solutions.
(b) Find the solution with the smallest number of five-dollar bills.
(c) Find the solution with the largest number of five-dollar bills.
(a) Let x be the number of five-dollar bills, y be the number of ten-dollar bills, and z be the number of twenty-dollar bills. Translate the given information into two equations, using x, y, and z as the variables.
x+y+z = 74
5x + 10y + 20z = 920
(Do not factor. Use integers or decimals for any numbers in the expressions.)
There are a total of 19 solutions.
(b) The solution with the smallest number of five-dollar bills
when the bank teller has five(s), ten(s), and twenty(twenties).
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