If the original price of something is $18 and the percent of discount is 65% what is the sale price? $5.40

Me find the missing dimension of a triangle height: 7 in., area: 21^2

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.

Which answer goes into the box? (90° clockwise rotation, 90° counter clockwise rotation, translation, or glide reflection)