SOLUTION: Media services charges $20 for a phone and $30/month for its economy plan. The equation c=30t+20 describes the total cost, c, of operating a Media services phone for t months. he

Question 183758: Media services charges $20 for a phone and $30/month for its economy plan. The equation c=30t+20 describes the total cost, c, of operating a Media services phone for t months.
he total cost for 8 months of service is $_____?
If a customer only $90 available, how many months of service can she recieve?
A) 2
B) 2 1/2 C) 3
D) 2 1/3
Answer by rachel42(1) (Show Source): You can put this solution on YOUR website!
Using the equation 30t+20=c, you are able to plug in 8 months in for "t" and solve the equation. That will give you $260 for 8 months of service. Using the same equation you are able to plus in $90 for "c" and then solve the equation for "t" which will tell you how many months the service will be provided. This will come about to be D. 2 and 1/3 months.
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