An airplane flew 5 hours with a tail wind of 25 km/h. The return flight against the same wind took 6 hours. Find the speed of the airplane in still air.
What is 275 km/h
500
2 + (-13) - (-31) - (24) + (17) - (-2)
What is 15
500
-2x - 3/4 > -5/6
What is x < 1/24
500
[(a^-2)(b^-3)/(a^4)(b^-1)] xy
What is xy/(a^6)(b^2)
500
Slope-intercept equation for the points (-2, -4) and (2, -1)
What is y=(3/4)x - 5/2
500
A vending machine takes only nickels and dimes. There are 5 times as many dimes as nickels in the machine. The face value of the coins is $4.40. How many of each coin are in the machine?