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The cost for a phone call is $0.75 for the first minute and $0.50 per

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The cost for a phone call is $0.75 for the first minute and $0.50 per  [#permalink]

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New post 24 Jan 2019, 04:20
1
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

81% (00:39) correct 19% (00:40) wrong based on 32 sessions

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The cost for a phone call is $0.75 for the first minute and $0.50 per minute after the first minute. If a phone call lasted x minutes, what was the cost of the phone call in terms of x?


A $0.75
B $0.75 + x
C $0.75 + 0.5x
D $0.75 + 0.5(x – 1)
E $1.25x
Spoiler: OA

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Re: The cost for a phone call is $0.75 for the first minute and $0.50 per  [#permalink]

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New post 24 Jan 2019, 04:24
Bunuel wrote:
The cost for a phone call is $0.75 for the first minute and $0.50 per minute after the first minute. If a phone call lasted x minutes, what was the cost of the phone call in terms of x?


A $0.75
B $0.75 + x
C $0.75 + 0.5x
D $0.75 + 0.5(x – 1)
E $1.25x


Total cost = 0.75 + 0.5(x -1.

x mins in total.

0.5 is applicable for x - 1 mins. For 1 mins 0.75 will be charged.

D is the correct answer.
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Re: The cost for a phone call is $0.75 for the first minute and $0.50 per  [#permalink]

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New post 24 Jan 2019, 09:03
Bunuel wrote:
The cost for a phone call is $0.75 for the first minute and $0.50 per minute after the first minute. If a phone call lasted x minutes, what was the cost of the phone call in terms of x?


A $0.75
B $0.75 + x
C $0.75 + 0.5x
D $0.75 + 0.5(x – 1)
E $1.25x


Cost of Phone Call = Cost for first 1 min + Cost for more than first 1 min

So, Cost of Phone Call = 0.75 + 0.50( x - 1 ), Answer must be (D)
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Re: The cost for a phone call is $0.75 for the first minute and $0.50 per   [#permalink] 24 Jan 2019, 09:03
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