Steve can paint a room three times as fast as billy. when they work together, steve and billy can paint a large room in 4 hours. how many hours would it take billy to paint it by himself?

16 hours

Step-by-step explanation:

Let x be the number of hours taken by Billy to paint a room by himself.

Speed of Billy

Since, Steve can paint a room three times as fast as Billy.

Then , speed of Steve =

If they worked together to paint a large room in 4 hours the we have the following equation:-

The time taken by Billy to paint the large room by himself = 16 hours

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20