Ireally need

jake is flying his helicopter on a trip from the airport to his secret hideout. if he flies at
140 miles per hour, the trip takes 3.2 hours. how long will the trip take if he flies at 160 miles per
hour?

So if he flew 140 mph and his trip took 3.2 hours, he went 140(3.2) = 448 miles
Now if he flies at 160 mph and needs to go 448 miles: 160x=448; divide both sides by 160 to solve for x and you get x = 2.8 hours

Assume that solution with 20% and 50% salt is x and y gallons respectively.

Therefore,

x+y = 300 => y=300-x

Additionally
20x+50y = 300*41 = 12300

Substituting for y

20x+50(300-x) = 12300 => 20x+15000-50x = 123000 => -30x = -2700

x= 90 gallons
y= 300-x = 300 - 90 =210 gallons