Multiply the polynomials (a2 + 5a – 4) and (2a2 – a + 5). Simplify the answer. Show your work.

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15