Plz help and show work

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Percent increase and decrease. original number: 45 new number: 18

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.