aleikebanks
10.12.2021 •
Mathematics
A utility company charges $0.14 per kilowatt-hour for energy a customer uses. They give a credit of $0.035 for every kilowatt-hour of electricity a customer with a solar panel generates that they don't
use themselves. A customer has a charge of $95.14 and a credit of $6.02 on this month's bill.
a) What is the amount due this month?
b) How many kilowatt-hours did they use?
c) How many kilowatt-hours did they generate that they didn't use themselves?
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Ответ:
9
Step-by-step explanation:
Call the Total Amount of money he had X.
Amount he used to buy pens: 3/8X
Amount of money left after buying pens: X - 3/8X = 5/8X
Amount he used to buy notebooks: 2/5 * 5/8X = 1/4X
1/4X or 2/8X for 2 notebooks, so if he spent 3/8X for notebooks, he would get 3 notebooks.
As a notebook cost 3 times a pens, so for 3/8X money, he bought 9 pens.