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tester [92]
3 years ago
13

600 units of electricity and 100 units of gas were used for a total cost of $388. Next month, 400 units of electricity and 150 u

nits of gas were used for a total cost of $277. Find the cost per unit of gas.
Mathematics
1 answer:
lana66690 [7]3 years ago
7 0

Answer:

Cost per Electricity Unit= $0.61

Cost per Gas Unit= $0.22

Step-by-step explanation:

Suppose,

Cost per Electricity Unit: e

Cost per Gas Unit: g

for the first month condition, equation would be

600*e+100*g=388...........................................(i)

and for the next month condition, equation would be like

400*e+150*g=277...........................................(ii)

By solving both linear equations simultaneously, we get

e=0.61    and     g=0.22

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