Tiffany collects perfume bottles. she has 99 bottles in her collection. two thirds of her perfume bottles are made of crystal. how many of the perfume bottles in tiffany's collection are made of crystal?

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

Every time you drive you will experience a combination of driving conditions and environments.

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k