Which values from the set {−6, −4, −2, 0, 2, 4, 6} satisfy this inequality? 3 + 1/2x ≥ 4

a. 2, 4 and 6 only

b. 0, 2 and 4 only

C. –4, –2 and 0 only

D. –6, –4, –2 and 0 only

the answer to this question is in the pic

yes

step-by-step explanation:

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