The side of a square is (4x-2y) what is the perimeter of the square

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Can u guys do this ratio question. this is extremely urgent a tap is leaking water at a rage of 1l every 8 hours. how long will it take for the tap to leak a total of 300ml?

Is the power produced directly proportional to the wind speed, give reasons for your answer?