Answer:
Pipe 1 twice as fast as pipe 2.
(Pipe 1 time * Pipe 2 time) / (Pipe 1 time + Pipe 2 time) = combined time
(x * (x/2)) / (x + x/2) = 10
(x^2/2) / 1.5 x = 10
x^2 / 2 = 15 x
x^2 /2 - 15 x = 0
x = 30 (slow pipe)
x/2 = 15 (fast pipe)
So it would take 30 hours using the slow pipe only.
Step-by-step explanation:
Answer:
x=6
Step-by-step explanation:
5(x-1) + 3x = 7x + 1
Distribute
5x -5 +3x = 7x+1
Combine like terms
8x -5 = 7x+1
Subtract 7x from each side
8x- 7x -5 = 7x-7x+1
x-5 =1
Add 5 to each side
x-5+5 = 1+5
x=6
Answer:
3t-9 >= 0
Step-by-step explanation:
Original function f(t)= square root 3t-9
There cannot be a negative in the radicand therefore 3t-9 cannot equal a negative number.