It would sure help a lot if I could take a peek at the drawings of the triangles.
Answer: 72 minutes
Step-by-step explanation:
Pipe A can empty the water in 180 minutes = (180/60) =3 hours
Pipe A does 1/ 3 of the job in 1 hour.
Pipe B can empty the water in 120 minutes = (120/60) = 2 hours.
Pipe B does 1/ 2 of thejob in 1 hour.
Together they will do:
1/ 3 + 1/ 2 = 5/6
Together, both pipes will do 5/ 6 of the job in one hour.
To get the total time to completely drain the water will be:
= 60 ÷ 5/6
= 60 × 6/5
= 12 × 6
= 72 minutes
It takes 72 minutes to empty the pool.
Answer:
A. is the answer
Step-by-step explanation:
:)
Answer: b= 30
Step-by-step explanation:
Answer:
(-4 , 6)
Step-by-step explanation:
3x +4y - 12=0
x = 1/3 × (12-4y)
y² = 9 × 1/3 × (12-4y) = 36 -12y
y² + 12y -36 =0
(y -6)² = 0
y = 6
x = -4
