Question

Juan has a smartphone data plan that costs $50 per month that includes 6GB of data, but will charge an extra $40 per GB over the included amount. How much would Juan have to pay in a month where he used went over by x GB?

Answer 1

(50+40x) dollars

Explanation:

THe fixed cost is $50 (this includes everything and 6GB of data).

Now, for every GB OVER 6 GB he uses, company charges $40 extra.

So, if he used "x" GB EXTRA, his EXTRA cost will be 40 * x = 40x

Thus, his total cost in the month would be fixed cost PLUS the extra, which would be

50 + 40x dollars