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Ellie is interested in getting a new phone. One phone company, phone 1 charges a monthly fee of 6$. They also charge 0.10$ per minute. Another company, phone 2, charges 5$ for a monthly fee and 0.25$ per minute. Write an equation for the total cost of each phone bill, where y is the total cost and x is the total number of minutes on the phone. Which company will allow Ellie to talk the longest is she only wants to spend 22$ a month

User George Liu
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1 Answer

7 votes

Answer:

Phone 1 will allow Ellie to talk the longest

Explanation:

Phone 1:

(0.10x) + 6 = y

(0.10x) + 6 - 6 = 22 - 6

0.10/0.10x = 16/0.10

x = 160 minutes

Phone 2:

(0.25x) + 5 = y

(0.25x) + 5 - 5 = 22 - 5

0.25/0.25x = 17/0.25

x = 68 minutes

User Sean Lintern
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