The population of city A is 0.6 million less than the population of city B, and the population of city C is three times that of city B, decreased by 2.7 million. If the sum of the populations of city A, city B and city C is 78.2 million, find the population of each city.

the answer is c just got it on ed

step-by-step explanation:

the answer is 0052

0 0 5 2

5 0 2 6 3 5

− 0

2 6

− 0

2 6 3

− 2 5 0

1 3 5

− 1 0 0

3 5

his answer is incorrect. i just used it, and it said it was incorrect. the answer is 0.

approximately 5 hours 32 minutes

let x be the amount of it takes both pumps to fill and 1 pump to empty

so the pumps fill/empty at the rate of per hour

first pump fills at a rate of per hour

second pump fills at a rate of per hour

third pump empties at a rate of per hour

together the reservoir fills at a rate of

+ - =

multiply each term by 720x

120x + 90x - 80x = 720

130x = 720 ( divide both sides by 130 )

x = = 5. hours

(0. × 60 ≈ 32 minutes )

time taken to fill reservoir is 5 hours 32 minutes