SOLUTION: you and your friend are painting the walls of your apartment. You estimate that there is 1000 square feet to be painted. You paint at a rate of 4 Sq ft a minute while your friend p
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Question 514628: you and your friend are painting the walls of your apartment. You estimate that there is 1000 square feet to be painted. You paint at a rate of 4 Sq ft a minute while your friend paints at 3 sq ft a minute. your friend shows up 45 minutes after you have started painting.
write an equation that gives the total number of sq ft y as a function of the number of minutes x it takes to paint all the walls.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
4 square feet per minute times 45 minutes is 180 square feet. Once the friend shows up, the two of you are painting at a rate of 4 + 3 = 7 square feet per minute. If 
is meant to represent the total time painting (solo plus with the friend), then the amount of time spent painting with the friend is 
and the area painted by you and the friend is )
\ =\ 7(x\ -\ 45)\ +\ 180)
John
My calculator said it, I believe it, that settles it
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