2. Let u = <9, 4>, v = <-2, 5>. Find u + v. (1 point) 0 <13,3>
0 <14, 2>
0<7,9>
0 <11, -1>

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

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

Tanyss's house has 25 windows. her brother has washed 22 of the windows. what percent of the windows has her brother washed?