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October 20, 2014

October 20, 2014

Posted by **Anonymous** on Tuesday, March 22, 2011 at 12:23am.

Suppose that 1 gallon of paint is used to cover 400 sq feet. Jordan plans to apply four coats of the goldenrod paint mixture to the 12-foot wall and the 9-foot wall leaving only the window and baseboard unpainted. How many gallons of the goldenrod paint mixture will he need? Express your answer as a decimal to the nearest hundredth.

- 8th grade math -
**Reiny**, Tuesday, March 22, 2011 at 8:13amI will ignore all the jibberish about paint colour names and simply use colour A for the large wall and colour B for the other walls

area of large wall = 12(7.5) - 5(6) = 60 square feet

area of other two walls = (9)(7.5) + 10(7.5) = 142.5 square feet

he will need 60/240 or .25 gallon of colour A for the large wall, which would be 1 quart

he will need 142.5/400 or .35625 gallons of colour B, so he needs 2 quarts of colour B

It seems silly to ask for accuracy to the nearest hundredth in the number of gallons needed.

Can you imagine walking into a paint store and asking for .356 of a gallon of paint?

- 8th grade math -
**Anonymous**, Tuesday, May 3, 2011 at 11:18pmwhat is the y-coordinate of the point of intersection of the graphs of x+2y=-6 and 2x+y=24?

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