(GIVING EXTRA POINTS ON THIS ONE!! IM ALSO GIVING AWAY BRAINLIEST TO WHO EVER HELPS ME OUT :D) If you roll a ball down a ramp, which factor will have the greatest effect on the amount of friction created?

A) Force applied to the ball

B) Speed of the ball

C) Texture of the surface

D) Weight of the ramp

(Here is an image if needed) :

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply