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# The cost of sending a package special delicery is x cents per ounce up

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Math Expert
Joined: 02 Sep 2009
Posts: 53066
The cost of sending a package special delicery is x cents per ounce up  [#permalink]

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06 Feb 2019, 02:21
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Question Stats:

100% (01:54) correct 0% (00:00) wrong based on 7 sessions

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The cost of sending a package special delivery is x cents per ounce up to 10 ounces and y cents for each for each ounce in excess of 10. Which of the following represents the total cost, in cents, of sending special delivery a package weighing w ounces, if w > 10 ?

A. $$x+(w-10)*y+10$$

B. $$x+(w-10)+y$$

C. $$10x+10*(w-y)$$

D. $$10x+y*(w-10)$$

E. $$10x+w*y$$

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Re: The cost of sending a package special delicery is x cents per ounce up  [#permalink]

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06 Feb 2019, 02:26
Bunuel wrote:
The cost of sending a package special delivery is x cents per ounce up to 10 ounces and y cents for each for each ounce in excess of 10. Which of the following represents the total cost, in cents, of sending special delivery a package weighing w ounces, if w > 10 ?

A. $$x+(w-10)*y+10$$

B. $$x+(w-10)+y$$

C. $$10x+10*(w-y)$$

D. $$10x+y*(w-10)$$

E. $$10x+w*y$$

cost up to 10 ounces = 10x.

*** x per ounce

cost of additional ounces = (w - 10)y

Total = 10x + (w - 10)y

D is the correct answer.
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Re: The cost of sending a package special delicery is x cents per ounce up  [#permalink]

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06 Feb 2019, 02:54
D should be the right answer for this question!

Here is what we know:
Cost of an ounce upto 10 ounces: x
Cost of an ounce after 10 ounces: y
Weight of the package : w, where w>10

Total cost = Quantity * Cost per item
Cost for 10 ounces = 10 * x

Excess over 10 ounces is charged at y per ounce, therefore,

w - 10 = number of ounces over 10 ounces (We know that w>10)
Cost for (w-10) ounces = (w-10)*y

To find the final price of sending w ounces add both together:
10x + (w-10)y
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Concentration: Sustainability, Marketing
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Re: The cost of sending a package special delicery is x cents per ounce up  [#permalink]

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06 Feb 2019, 04:48
Bunuel wrote:
The cost of sending a package special delivery is x cents per ounce up to 10 ounces and y cents for each for each ounce in excess of 10. Which of the following represents the total cost, in cents, of sending special delivery a package weighing w ounces, if w > 10 ?

A. $$x+(w-10)*y+10$$

B. $$x+(w-10)+y$$

C. $$10x+10*(w-y)$$

D. $$10x+y*(w-10)$$

E. $$10x+w*y$$

expression would be
$$10x+y*(w-10)$$
IMO D
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Re: The cost of sending a package special delicery is x cents per ounce up   [#permalink] 06 Feb 2019, 04:48
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# The cost of sending a package special delicery is x cents per ounce up

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