Points p q r s and t are the verticals of a rectangular pyramid how many planets are illustrated

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

3x + 4y = 5 x- 3y = -7 solve by substitution