Quick algebra questions : )
1). which values best approximate the solutions of -4x^2+1...
Mathematics, 29.01.2020 17:53, brenda0113hernandez
Quick algebra questions : )
1). which values best approximate the solutions of -4x^2+11x+2=0?
a). 1.5 and 2.9
b). -0.2 and 2.9
c). 2 and 2.9
d). -0.2 and 2
2). what is the solution set of 4x^2-3=11x?
a). {-3/4,1}
b). {1/4,-3}
c). {-1/4,3}
d). {3/4,-1}
3). what would the graph of g(x)=-(x+2)^2+5 look like?
Answers: 2
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What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.
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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
Answers: 2
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An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb. the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.
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