Sydney can paint a 60 square foot wall in 40 minutes. working with her friend cleveland, the two of them can paint the wall in 25 minutes. how long would it take cleveland to do the job himself?

In one minute Sydney can paint 60/40 = 1.5 sq.ft.
Working together for one minute they can paint 60/25 = 2.4 sq.ft.
Let the area Cleveland can paint in one minute be x sq.ft.
1.5 + x = 2.4
x = 2.4 - 1.5 = 0.9 sq.ft.
Therefore Cleveland can paint 0.9 sq.ft. in one minute. So Cleveland would take:
working by himself.

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paul's with a y-intercept of $ 2856