7 gallons of pure acid and 14 gallons of 10% acid
Answer:
0.5
Step-by-step explanation:
45 = 90% * x
45 = .90x
45/.90 = x
x = 50
45 is 90% of 50
Answer:
360 mi/h
Step-by-step explanation:
The speed for the outbound trip was ...
speed = distance/time = (715 mi)/(2 1/6 h) = 330 mi/h
The inbound speed was ...
(715 mi)/(1 5/6 h) = 390 mi/h
The airspeed of the plane is the average of these two ground speeds, so is ...
(330 +390)/2 = 360 . . . . mi/h
Answer:
m = -12 / 6 = -2 / 1 = -2
So its -2