Let P be the set of polynomials. Let a, b, c, and d be elements of P such that b and d are nonzero elements of P. Which statement about this sum is true? A. The sum is a rational expression. B. The sum is a polynomial. C. The sum is an integer. D. The sum is a rational number.

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?