A bank teller has a total of 73   bills in​ five-, ten-, and​ twenty-dollar denominations. The total value of the money is ​$900 .   ​(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.   nothing equals 73   nothing equals 900

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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.