Question

DO the following:
A. solve the equation
B. answer the question

Deni can clean the pool four times as fast as her sister lamur. Together they can do the job in 3 hours. How long would it take each of them working alone?

Answer 1

D = Deni L = Lamur h = hours
Dh = 4Lh
D + L = 3h

Answer 2

Cool I got that :)

Answer 3

So substitute...
4Lh + L = 3h so that L = 3/5

Answer 4

Now solve for D by substituting 3/5 in D = 4L

Answer 5

D = 3/5(4)

Answer 6

d= 2.4

Answer 7

Then switch the D and L for the answer.

Answer 8

so do 4(3/5) ?

Answer 9

So L = 2.4h and D = 3/5h