Subtract express each diffrence in simplest form : 2 - 1/3-9/10 and 4-5/6- 3/8

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

We just started the introduction into circles and i have no idea how to do this.

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.