Monica can fill a tub in 15 minutes with the hot water faucet and in 12 minutes with the cold water faucet. The drain can empty the tub in 20 minutes. How long will it take to fill the tub if both faucets and the drain are open?

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.