setting up an equation:Leila ran in a 5-kilometer race to...

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aold
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setting up an equation:Leila ran in a 5-kilometer race to...

Postby aold » Wed Jul 01, 2009 8:37 pm

I need help with setting up the equation for this word problem: Leila ran in a 5-kilometer race to raise money for the expansion of her city's animal shelter. Each sponsor donated $2.00 for each kilometer that she ran. She raised $90.00. How many sponsors did she have?

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stapel_eliz
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Postby stapel_eliz » Wed Jul 01, 2009 9:15 pm

aold wrote:Leila ran in a 5-kilometer race to raise money for the expansion of her city's animal shelter. Each sponsor donated $2.00 for each kilometer that she ran. She raised $90.00. How many sponsors did she have?

If you're not sure how to translate the word problem into algebra, then start plugging in numbers, and see what patterns you can find.

The exercise does not say that she did not finish the race, so presumably she did finish. How much then was she paid by any one given sponsor for the race? (Hint: Multiply.) Then:

Code: Select all

sponsors | paid | total paid
=========+======+===========
    1    |  10  | 10*1 = 10
    2    |  10  | 10*2 = 20
    3    |  10  | 10*3 = 30
    4    |  10  | 10*4 = 40
    5    |  10  |
    6    |
   ...

Where does this lead you? :wink:


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