Solve the system of equations.
1) 2x + 3y + z=-5
3x - 4y - Z= 22
5x + y +3z=-2

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?