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April 1, 2015

April 1, 2015

Posted by **Bob** on Sunday, May 18, 2008 at 9:23am.

In 2004, the Diabetic Express charged $27.06 for a vial of Humulin insulin and $34.39 for a vial of Nevolin Velosulin insulin. If a total of $1565.57 was collected for 50 vials of Insulin, how many vials of each type were sold?

- Algebra -
**drwls**, Sunday, May 18, 2008 at 10:25amSolve this pair of equations for x and y.

x + y = 50

27.06 x + 34.39 y = 1565.57

Try substiting 50-x for y in the second equation.

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