A helicopter was flying at 200 feet. it then flew up 30 feet then descended 54 feet, and finally leveled of 21 feet higher. What altitude is the helicopter now?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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.