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September 21, 2014

September 21, 2014

Posted by **Jada** on Sunday, March 6, 2011 at 6:32pm.

- Algebra -
**jai**, Sunday, March 6, 2011 at 8:47pmlet x = area to be painted (in sq ft)

let y = gallons of paint needed

therefore, using the second statement of the problem, we can find the ration of sq ft area painted per gallon:

10000 sq ft / 20 gallon = 500 sq ft / gallon

thus, to get the number of gallons needed, we divide the area surface to be painted by this ratio, so the function becomes:

y = x / 500

for instance we want to paint 1500 sq ft of drywall,, thus the number of gallons needed is:

y = 1500 / 500 = 3 gallons

hope this helps~ :)

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