30. household chores you can wash one window in 15 minutes and your
sister can wash one window in 20 minutes. how many minutes will it take
to wash 12 windows if you work together?

An hour and forty three minutes (if I did it right)

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.

where is the rest of the

step-by-step explanation: