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HELP!!! Equations: Horizon Wireless: y=0.40x+55 Firefly Wireless: y=0.15x+80 How many minutes (x) would you have to use for the total cost (y) of both cell phone plans to be the …

HELP!!! Equations: Horizon Wireless: y=0.40x+55 Firefly Wireless: y=0.15x+80 How many minutes (x) would you have to use for the total cost (y) of both cell phone plans to be the …
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3 votes
HELP!!!

Equations:
Horizon Wireless: y=0.40x+55
Firefly Wireless: y=0.15x+80

How many minutes (x) would you have to use for the total cost (y) of both cell phone plans to be the same?

User Lee Byron
by
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1 Answer

4 votes
0.40x + 55 = 0.15x + 80
0.40x - 0.15x = 80 - 55
0.25x = 25
x = 25 / 0.25
x = 100 minutes <=
User Ramesh Bugatha
by
7.6k points
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