Sally can paint a room in 4 hours while it takes Steve 9 hours to paint the same room. How long would it take them to paint the room if they worked​ together? i need help plz

hope this helps

Step-by-step explanation:

Sally can paint a room in 9 hours while it takes steve 8 hours to paint the same room. How long would it take them to paint the room if they worked together?  ... 17x+=+72 x+=+4.24 hrs .24%2A60+=+14.4 working together, they can paint the room in 4 hrs 14 min ...

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.