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Telephone company A charges $ 3.00 for the first minute of a
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03 Mar 2019, 03:38
03 Mar 2019, 03:38
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Question Stats:
60% (01:58) correct
39% (02:07) wrong based on 33 sessions
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Telephone company A charges $ 3.00 for the first minute of any long distance call and $ 0.50 for each additional minute. Telephone company B charges $ 2.00 for the first minute of any long distance call and $ 0.70 for each additional minute. If the cost of a call lasting x minutes, where x is a positive integer, is $ 15.00 more with telephone company B than with telephone company A, then what is the value of x?
A. 56
B. 60
C. 77
D. 80
E. 81
A. 56
B. 60
C. 77
D. 80
E. 81
Re: Telephone company A charges $ 3.00 for the first minute of a
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04 Mar 2019, 14:56
04 Mar 2019, 14:56
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The cost of a call lasting x minutes charged by company A: 3 + 0.50 (x-1)
The cost of a call lasting x minutes charged by company B: 2 + 0.70 (x-1)
"The cost of a call lasting x minutes is $ 15.00 more with telephone company B than with telephone company A" means that we can write:
2 + 0.70 (x-1) - [3 + 0.50 (x-1)] = 15
2 + 0.70x - 0.70 - 3 - 0.50x + 0.50 = 15
0.20x = 16.20
x = 81
Answer choice E.
The cost of a call lasting x minutes charged by company B: 2 + 0.70 (x-1)
"The cost of a call lasting x minutes is $ 15.00 more with telephone company B than with telephone company A" means that we can write:
2 + 0.70 (x-1) - [3 + 0.50 (x-1)] = 15
2 + 0.70x - 0.70 - 3 - 0.50x + 0.50 = 15
0.20x = 16.20
x = 81
Answer choice E.
Re: Telephone company A charges $ 3.00 for the first minute of a
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30 Sep 2024, 08:54
30 Sep 2024, 08:54
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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