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If f footballs cost d dollars, then in terms of d and f how many dolla

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If f footballs cost d dollars, then in terms of d and f how many dolla  [#permalink]

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New post 17 Sep 2018, 00:48
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Question Stats:

97% (00:31) correct 3% (00:07) wrong based on 28 sessions

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If f footballs cost d dollars, then in terms of d and f how many dollars would 10 footballs cost?


A. \(10 f d\)

B. \(f\frac{d}{10}\)

C. \(10\frac{d}{f}\)

D. \(d\frac{f}{10}\)

E. \(f\frac{d}{10}\)

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Re: If f footballs cost d dollars, then in terms of d and f how many dolla  [#permalink]

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New post 17 Sep 2018, 02:38
Bunuel wrote:
If f footballs cost d dollars, then in terms of d and f how many dollars would 10 footballs cost?


A. \(10 f d\)

B. \(f\frac{d}{10}\)

C. \(10\frac{d}{f}\)

D. \(d\frac{f}{10}\)

E. \(f\frac{d}{10}\)



f footballs cost d dollars

1 football costs d/f dollars

10 footballs cost 10d/f dollars.

The best answer is C.
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Re: If f footballs cost d dollars, then in terms of d and f how many dolla  [#permalink]

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New post 17 Sep 2018, 06:22
Top Contributor
Bunuel wrote:
If f footballs cost d dollars, then in terms of d and f how many dollars would 10 footballs cost?


A. \(10 f d\)

B. \(f\frac{d}{10}\)

C. \(10\frac{d}{f}\)

D. \(d\frac{f}{10}\)

E. \(f\frac{d}{10}\)


If f footballs cost d dollars...
With this information, how much does ONE football cost?
If you're not sure, try testing some values.
For example, if 3 footballs cost 15 dollars, then ONE football costs 5 dollars (aka 15/3 dollars)
If 7 footballs cost 28 dollars, then ONE football costs 4 dollars (aka 28/7 dollars)
If 10 footballs cost 80 dollars, then ONE football costs 8 dollars (aka 80/8 dollars)
See the pattern?

So, if f footballs cost d dollars, then ONE football costs d/f dollars

If ONE football costs d/f dollars, then TWO football costs (2)(d/f) dollars
If ONE football costs d/f dollars, then THREE football costs (3)(d/f) dollars
.
.
.

If ONE football costs d/f dollars, then TEN football costs (10)(d/f) dollars

Answer: C

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Brent
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Re: If f footballs cost d dollars, then in terms of d and f how many dolla &nbs [#permalink] 17 Sep 2018, 06:22
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If f footballs cost d dollars, then in terms of d and f how many dolla

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