Question

Cable TV service costs $1,020 per year. Joaquin estimates that the rates go up by $60 each year. The expression below represents the total amount of money spent on cable TV for the next 10 years.

Which of the following is another way to write the expression?

Answer 1

the correct answer is A

Answer 2

The first year, the cost is equal to $1,020

and each year after that, the cost is augmented by $60.

Then the equation can be written as:

Cost(y) = $1,020 + $60*y

where y is the number of years.

so when y = 0 we have no increase, when y = 1 the increase only applies one time, when y = 2, the increase applies 2 times and so on.

other way of writting it is taking the common factor, using that 1020/60 = 17

Cost(y) = $60*(17 + y)