Simplify the expression. (x^1/15)^5

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.

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.