Find the value of the variables in the table
x = e, 5, 7, 10, 12
y = 10, 13, 19, f, 34

a. f = 28; e = 4
b. e = 28; f = 4
c. f = 30; e = 2
d. e = 30; 5 = 2

y= -2x+4, have a great day

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