Question

The table shows two options provided by a high-speed Internet provider.

Setup Fee ($) Cost per Month ($)
Option 1 80 30
Option 2 No setup fee $40


Part 1 out of 2
In how many months will the total cost of both options be the same? What will that cost be?

In months the total cost of both options will be the same. That cost will be $.

Answer 1

8 months and $320

Explanation:

To find when 30m + 80 = 40m, isolate m.

30m + 80 = 40m

Subtract 40m from both sides.

-10m + 80 = 0

Subtract 80 from both sides.

-10m = -80

Divide both sides by -10

m = 8

To find the cost, substitute 8 as m in one of the equations.

40(8) = 320