Question

Media Services charges $20 for a phone and $30 for its economy plan. The equation c = 30t + 20 describes the total cost, c, of operating a Media Services phone for t months.

That is the total cost for t months of service?

If customer has only $90 available, how many months of service can they receive?

Answer 1

So in this case you are given "C", and need to solve for "t".

90=30t+20
70=30t
70/30=t
t=2.33(repeating)
So they can pay for 2 full months, as the ".333" isn't a full month.

Answer 2

Yea.

Answer 3

I am lost.

Answer 4

Would it be 2 1/3?

Answer 5

That is the answer to the EQUATION yeah, but to the actual QUESTION, they could only pay for 2 months, because you only consider the highest whole number, which here is 2.

Answer 6

2 1/2

Answer 7

2/1/2??????

Answer 8

The answer to the question is 2. With the costs and how much they can pay, they are able to pay for 2 full months.

Answer 9

oh crud. Thank you. The total cost for 3 months of service is???

Answer 10

$3?

Answer 11

if you wanted 3 months of service you would set the equation up like this:

c=30(3)+20
c=90+30
c=120

it would be 120$ for 3 months of service

Answer 12

hmm
then $3 would not be right.

Answer 13

$90

Answer 14

$9

Answer 15

Oh crap

Answer 16

$120

Answer 17

Yeah, it would be 120$ for 3 months

Answer 18

gosh, I am a moron. Okay so if a customer has just $90 how many month of service can they receive?

Answer 19

2 months

Answer 20

2 1/2 months

Answer 21

2 months?

Answer 22

Yeah, because you can't pay for half a month of service, you have to round down to 2.