Roscoe's family has a dinner at a restaurant. the total cost is $103.80. this includes 5% tax and 15% tip on the pre-tax amount. how much was the bill before tax and tip?

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.