SOLUTION: This is 1 question with different parts. Media Services charges $40 for a phone and $30/month for its economy plan. The equation c = 30t + 40 describes the total cost, c, of opera

Algebra ->  Graphs -> SOLUTION: This is 1 question with different parts. Media Services charges $40 for a phone and $30/month for its economy plan. The equation c = 30t + 40 describes the total cost, c, of opera      Log On


   

Question 165536: This is 1 question with different parts.
Media Services charges $40 for a phone and $30/month for its economy plan. The equation c = 30t + 40 describes the total cost, c, of operating a Media Services phone for t months.
The total cost for 8 months of service is $280
If a customer has only $110 available, how many moths of service can she receive?
a)2 and 1/3
b)2 and ½
c)2
d)3
Graph the equation c = 30t +40.
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

c=30t%2B40 ---------> working eqn
Via given: c=110
110=30t%2B40
%28110-40%29%2F30=t
t=70%2F30=2.33333 ----> 2-1/3 months
ANSWER: a
See below graph: x=cost vs.y=+months -->x=30y%2B40
-- on the graph shows cost of $40 for the phone (x) even with no plan
Thank you,
Jojo