Expand: (i). ( 2x + 4y + z)2
(ii) ( -3x + 6y – 2z)2
(iii) ( 5x + 2y)3
(iv) ( 4x – z)3
on the axes.​

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Is this a polynomial function? i need to know asap

Carmen ayer en el mercado compro 3/4 kg de guayabas, 6/8 kg de peras, 1/2 kg de naranjas ¿cuantos kilogramos de fruta compro?