The sunday school teacher gave 5 friend's day invations to each of her 19 students to give to their friends. she had 5 left over. how much invations did the teacher start out with?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?