Two hoses from two different taps are used to fill a fishpond. The first hose alone takes 20 minutes to fill the fishpond. The second hose alone takes 30 minutes to
fill the fishpond. How long would it take to fill the fishpond if both hoses are used?

 12 minutes

Step-by-step explanation:

Two rates for hoses A and B.  FP is the Fish Pond.

A = 20 min/FP   or (1/20)FP/min

B = 30 min/FP   or (1/30)FP/min

The time in minutes, X,  to fill  one FP:

                     1FP = X*((1/20)FP/min) + X*((1/30)FP/min)  

                     1FP = X*(1/20+1/30)FP/min

                     1FP = X*(2.5/30)FP/min

                      X = 12 minutes

answer: 1,380

step-by-step explanation:

1: you turn %15 into a decimal by moving the decimal point two places to the left.

2: and then you multiply .15 by 1,200 , which will get you 180.00

3: from there you will add 180 to 1,200

4: which will get you 1,380

hope it *im kind of slow so idk if my answer is right*

$9.41

step-by-step explanation: