David can paint the living room in 4 hours and anna can paint it in 6 hours. how long will it take the two of them to paint the living room if they work together?

12/5 = 2.4

Step-by-step explanation:

In 4 hours, David can paint 1 room

In (4/4)=1 hour, David can paint 1/4 of the room

Similarly,

In 6 hours, Anna can paint 1 room

In 1 hour, Anna can paint 1/6 of the room

Therefore,

In one hour, they can paint (1/4 + 1/6) of the room if they work together

                                             = 5/12

So,

They can paint 1 room in 12/5 hours

                                         = 2.4 hours

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.

the equation is going to be