Aroofing company counted 65 invoices at the end of the month. they charge $490 for a new installation and $68 for a repair. the total dollar amount of the invoices was $10,750. how many new roofs were installed?

There were 15 installments of the roof.

Step-by-step explanation:

We are given the following information in the question:

Total number of invoice = 65

Cost of installation = $490

Cost of repair = $68

Total cost = $10,750

Let x be the number of installments and y be the number of repairs.

Then, we can write the following equations:

Solving the two equations in two variables, we get:

Thus, there were 15 installments and 50 repairs of the roof.

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b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100