If y varies directly with x, write an equation for the direct variation. Then find each value, if y = 6 when x =30, find y when x = 15

Sara bought a pair of pants that were on sale for 30 percent off of the original price. if the original price of the pants was $29, what was the sales price of the pants?

Asap will give brainliest and a lot of points

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.