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Phone plan A charges $1.25 for the first minute and $0.15 fo

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Phone plan A charges $1.25 for the first minute and $0.15 fo [#permalink] New post 19 Aug 2018, 04:00
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Question Stats:

75% (01:34) correct 25% (00:45) wrong based on 8 sessions
Phone plan A charges $1.25 for the first minute and $0.15 for every minute thereafter. Phone plan B charges a $0.90 connection fee and $0.20 per minute. Which of the following equations could be used to find the length, in minutes, of a phone call that costs the same under either plan?

(A) 1.25 + 0.15x = 0.90x + 0.20
(B) 1.25 + 0.15x = 0.90 + 0.20x
(C) 1.25 + 0.15(x – 1) = 0.90 + 0.20x
(D) 1.25 + 0.15(x – 1) = 0.90 + 0.20(x – 1)
(E) 1.25 + 0.15x + 0.90x + 0.20 = x
[Reveal] Spoiler: OA

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Re: Phone plan A charges $1.25 for the first minute and $0.15 fo [#permalink] New post 20 Aug 2018, 22:09
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Let us assume x= total length of time
For plan A first minute = $1.25
Remaining time = (x-1) minutes

While for plan B
there is a flat rate apart from the connection fee of $0.9
Hence to find the length of time when the prices of the two plan is equal we can form the eqn as option C

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Re: Phone plan A charges $1.25 for the first minute and $0.15 fo   [#permalink] 20 Aug 2018, 22:09
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Phone plan A charges $1.25 for the first minute and $0.15 fo

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