This is my latest question for today I put extra points too ty guys for helping me

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

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?

The formula to determine energy is e=1/2mv2? what is the formula solved for v?