If it takes 4 identical pipes 2 hours to fill a pool, how many hours will it take 1 pipe alone to fill the same pool? f)16 hrs g)10hrs h)8 hrs j)4 hrs k) none of these

Suppose one pipe alone can fill it in x hour

one hour work of one pipe = 1/x work

one hour work of 4 pipes together = 4/x work

2 hour work of four pipes = 2*( 4/x) = 8/x work

but all four together in 2 hours did complete work that is 1

so 8/x = 1

hence x= 8

so one pipe alone can fill it in 8 hours

Answer : 8

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: