A type of hot tub holds 400 gallons of water. One hose can fill the hot tub in 6 hours while another hose takes only 4 hours. How long will it take for the hot tub to be filled if both hoses are used?

step-by-step explanation:

when the line is solid:

when the line is dashed:

this > inequality sign means:

this < inequality sign means:

this > inequality sign means:

this < inequality sign means:

about the problem:

srry i'm not done ! i'll

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:

i dont know this one sorry