Use it he segment addition postulate to solve for the missing measurement

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

What is the slopeof the live that passes through the points and (-2,-5) and (3,-1)

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?