WE CAN SOLVE THIS PROBLEM AS A VIC (VARIABLE IN ANSWER CHOICE) AND...

32. We can solve this problem as a VIC (Variable In answer Choice)

and plug in values for the variable x. Let’s say x = 6. (Note that

there is a logical restriction here in terms of the value of x. Lindsay

has to have a rate of less than less than 1 room per hour if she

needs Joseph’s help to finish in an hour).

If Lindsay can paint 1/6 of the room in 20 minutes (1/3 of an hour),

her rate is 1/2.

rt = w

r(1/3) = 1/6

r = 1/2

Let J be the number of hours it takes Joseph to paint the entire

room. Joseph’s rate then is 1/J. Joseph and Lindsay’s combined

rate is 3/2 + 1/J, which can be simplified: