The Ross family and the Morgan family each used their sprinklers last summer. The water output rate for the Ross family's sprinkler was 20 L per hour. The water output rate for the Morgan's family sprinkler was 40 L per hour. The families used their sprinklers for a combined total of 60 hours, resulting in a goal water output of 1700 L. How long was each sprinkler used?

4

step-by-step explanation:

lol.

it's ok we all do this sometimes.

-aparri

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation:

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.