If 3 students eat 2 pizzas how many pizzas are needed for 54 students

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price