Which computation could be used to find the area of the front cover of this notebook?

a. add 15 and 15 and 10 and 10

b. add 15 and 10

c. add 15 and 10 and multiply the answer by 2

d. multiply 15 by 10

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

If p(x) is the total value of the production when there are x workers in a plant, then the average productivity of the workforce at the plant is a(x) = p(x) x . (a) find a'(x). a'(x) = xp'(x) − p(x) x a'(x) = xp'(x) − p(x) x2 a'(x) = p'(x) − p(x) x a'(x) = xp'(x) − p'(x) x2 a'(x) = p'(x) − xp(x) x2 why does the company want to hire more workers if a'(x) > 0? a'(x) > 0 ⇒ a(x) is ; that is, the average productivity as the size of the workforce increases. (b) if p'(x) is greater than the average productivity, which of the following must be true? p'(x) − xp(x) > 0 p'(x) − xp(x) < 0 xp'(x) − p'(x) > 0 xp'(x) − p(x) < 0 xp'(x) − p(x) > 0

Quadrilateral abcd is a parallelogram with diagonals that intersect at point e. which of the following statements is true?