The $XYZ$ company has to pay $5,000 for rent each month. In addition, their monthly electricity bill is $1.45 per kilowatt-hour of electricity used. If the total cost for both rent and electricity in January was $16,520.25, how many kilowatt-hours of electricity did they use?

7,945 kilowatt-hours

Step-by-step explanation:

Since the monthly rent is $5,000, first subtract 5,000 from the total cost so that you only have the cost for the electricity bill:

16,520.25 - 5,000 = 11,520.25

Then, since the electricity bill is $1.45 per kilowatt-hour used, divide the new total by 1.45:

11,520.25 ÷ 1.45 = 7,945

Hope this helped!

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).