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Variable Equations

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Manager
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Joined: 13 Oct 2009
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Variable Equations [#permalink] New post 01 Feb 2010, 19:01
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D
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Question Stats:

91% (02:10) correct 9% (01:37) wrong based on 28 sessions
Hey guys, the book gave a plug-in solution to this question which didn't help me actually understand this. Can you guys help describe an alternative straight-foward solution instead? Thanks

Sarah's seafood restaurant gets a delivery of fresh seafood every day, 7 days per week, and her delivery company charges her d dollars per delivery plus c cents per item delivered. If lst week Sarah's seafood restaurant had an average of x items per day delivered, then which of the following is the total cost, in dollars, of last week's deliveries ?

A. 7cdx/100
B. d + 7cx/100
C. 7d + xc/100
D. 7d + 7xc/100
E. 7cdx
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Director
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Re: Variable Equations [#permalink] New post 01 Feb 2010, 20:43
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Straightforwar "D"

7d + (c/100)*7x

What is unclear_?
Manager
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Location: Germany
Concentration: Strategy, General Management
Schools: IE '15 (M)
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Kudos [?]: 22 [0], given: 7

Re: Variable Equations [#permalink] New post 02 Feb 2010, 09:27
Well, i would say "D" as well.

$= 7 Days *d + Average Items * c * 7 days; cents need to be written in "/100"

--> $= 7*d + (XC*7)/100

Micha
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Re: Variable Equations [#permalink] New post 02 Feb 2010, 10:27
LM wrote:
Straightforwar "D"

7d + (c/100)*7x

What is unclear_?


yea quite an easy question.

Letme elaborate


Total delivery charges per delivery = d* number of days = 7d

total delivery charges per item = c/100

total number of items per day = x
total number of items for the week = 7x

so total delivery charges (for per item condition) = 7xc/100

so total charges = 7d+ 7xc/100
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Manager
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Re: Variable Equations [#permalink] New post 02 Feb 2010, 20:16
Okay, thanks gurpreetsingh. I wasn't sure the purpose of c/100. I thought the decimals value was already reflected in the variable c ( as in c= .25 cents)

Thanks
Manager
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Re: Variable Equations [#permalink] New post 04 Feb 2010, 15:59
Answer is D. Straightforward question.
Re: Variable Equations   [#permalink] 04 Feb 2010, 15:59
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