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October 21, 2014

October 21, 2014

Posted by **PLEASE NEED HELP** on Thursday, March 29, 2012 at 11:06pm.

- algebra -
**drwls**, Friday, March 30, 2012 at 3:05amTwo equations; two unknowns.

500 x + 100 y = 352

400 x + 150 y = 304.

Solve for x and y.

y is the cost per unit of gas.

x is the cost per unit of electricity.

2000 x + 750 y = 1520

2000 x + 400 y = 1408

350 y = 112

y = $0.32 per unit

x = $0.64 per unit

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