In triangle lmn, p lies on lm and q lies on ln. if pq is 1/2mn, pq is called what

6n^2-7n-75=0 solve by quadratic formula

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.