If you pick a marble out of 6 red and 10 black, record its color, and return it to the bag 200 times, how many times can you expect to pick a black marble?

4+6x-3x^3 in standard form with explanations because i don’t understand

Atriangle has side lengths of 15 inches and 30 inches. it also has angles that measure 45º and 20º. which of the following identifies the possible third angle of the triangle? a. 15 in., 65º b. 45 in., 65º c. 17 in., 115º d. 14 in., 115º

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?