How do you know that the sum of and is rational?

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

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.