Answer= 4 hours.
The first pipe can fill one pool in nine hours. So in one hour, it can fill 1/9th of the pool. Same with the other pipe, it can fill 1/6th of the pool in other hour.
So 1/9 + 1/6 would represent the first hour of filling the pool. Since 1/9 + 1/6 = .277.. , 27% of the pool is filled. Repeat this until you get to 100% (full pool).
First hour, 1/6 + 1/9 = .27
Second hour, 2/6 + 2/9 = .5
Third hour, 3/6 + 3/9 = .83
Fourth hour, 4/6 + 4/9 = 1.11
So in 4 hours, the pool will be filled.
2/4 is the fraction with the greatest value...
(x+4)(x-6)
x^2 - 6x + 4x - 24
X^2 - 2x - 24
Answer:
2/7
Step-by-step explanation:
Even numbers: 6, 8, 10, 20
P(E1) = 4/7
P(E2) = 3/6
4/7 × 3/6
2/7