Which expression results in a rational number? (1) V121 - 21
(3) 36 - V095
(2) 25.50
(4) 3√5 + 2/5

What is an alternate exterior angle

How to do this , and can some one explain

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.