Shailen is adding three numbers he gets a sum that is an even number between 10 and 20 show two addition equation shailen could have written

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.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.