The cost of electricity in a certain city is $0.08 for each of the first 300kWh (kilowatt-hours) and $0.13 for each kilowatt-hou
r over 300kWh. Find the number of kilowatt-hours used by a family with a $51.95 electric bill.
2 answers:
Step-by-step explanation:
0.08*300 + 0.13x = 51.95
Multiply thru by 100 to get:
8*300 + 13x = 5195
13x = 5195-2400
13x = 2,795
x = 215 hours
Answer:
515
Step-by-step explanation:
0.08×300 = 24
24 + 0.13(x-300) = 51.95
0.13(x-300) = 27.95
x-300 = 215
x = 515 kWhours
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