Simplify the given expression - no exponents should be left: (2^2)^2

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

What does x = in this equation x+3+2x=x+5

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.