Answer:
let y be the total number of students.
y×40/100=18
18×100/40=y
45=y
Answer:
the first one (a)
Step-by-step explanation:
(4g + 10) + (3g -13) > 46
7g - 3 >46
7g -3 +3 > 46 +3
7g > 49
7g/7 >49/7
g > 7
Answer:
3
Step-by-step explanation:
I got it wrong so then it told me what the correct answer was:)
pool has 45000 gallons. It loses 780 gallons per hour, so the amount at any given time:
45000 - 780h, where h is the number of hours.
The chemical could be added once the amount of gallons in the pool hits 15000. So the equation to solve:
45000 - 780h = 15000
solve:
30000 = 780h
38.46 = h
It will take about 38.46 hours before chemical could be added. It will not take longer than 2 days because 2 days is 48 hours, and we only need about 38 hours.
