SOLUTION: media services charges $40 for a phone and $20 a month for an economy plan. The equation c=20t+40 describes the total cost c, of operating a media service phone for t months. The t

Question 275684: media services charges $40 for a phone and $20 a month for an economy plan. The equation c=20t+40 describes the total cost c, of operating a media service phone for t months. The total cost for 8 months of service is? $_
If the customer has only $90.00 available, how many months can she recieve?
My choices are 3,2 1/3,2,2 1/2.
Can you help me solve this?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
c=20t+40
plug in 8 for t and get the cost for 8 months c=200
plug in 90 for c and calculate t t=2.5 =2 1/2
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