How many x intercepts appear on the graph of this polynomial function? f(x)=x^4-x^3+x^2-x

Charlie is a car salesman he earns $800 plus a 9% commission on all of her sales for the week if charlie receive the payment for $1960 this week how much where is total sales

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup