Three different hoses, each with its own pump, can be used to fill a swimming pool. If hose A is used by itself, the pool takes 6 h to fill. If hose B is used by itself, the pool takes 3 h to fill. If hose C is used by itself, it takes 2 h to fill. If all three hoses are used at the same time, how long does the pool take to fill? Explain your reasoning.

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

p = 6s

step-by-step explanation: