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bazaltina [42]
4 years ago
8

An internet service provider charges $18 per month plus an initial set up fee. one customer paid a total of $81 after 2 months o

f services .
(A) write an equation modeling this situation.
(B) what is the initial setup fee?
(C) how much does it cost after 5 months of service?
Mathematics
1 answer:
frosja888 [35]4 years ago
6 0
Ok so
cost=setupfee+costused
costused=(number of months) times (cost per month)
if we represent number of months as x
we know cost per month is 18
18x is costused
 and in 2 m onts, he paid 81 so
81=startup fee +18x
2 monts so x=2
81=startupfeee+36
subtract 36
45=startup fee

5 monts is x=5
45+18(5)=45+90=135


A. cost=18x+45
B. $45
C. $135
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