the average annual cost of heating a home woth solar energy is $200 with an inital cost of $9000. During the month of may, the solar energy outlet is offering a 25% discount off the total cost. Express the discounted cost as a function of the number of years.

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Answered on Mon Jul 04 2022

Given :

Initial cost of solar energy = $9000

Annual cost of solar energy = $200

Now, according to question there is 25% discount in the month of may.

So, 75% of 9000 = 75/100 × 9000

= 6750

And, 75% of annual cost 200 = 75/100 × 200

= 150

Now, let the number of years be x

Then, cost of solar energy for x years can be written as :

Y = 6750 + 150x

Where Y = Total cost