Arby's advertises $5 for 3 beef and cheddar sandwiches. how much is this per sandwich?

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.

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0