kellimcollier9377

22.06.2019 • 

Mathematics

Drag the tiles to the correct boxes to complete the pairs. the owner of a real estate agency is looking over the monthly commission earned by the top three brokers in the past month. she has calculated the mean and standard deviation, sd, of the their commissions, in dollars, as shown below. amanda benjamin cathy mean = 75,463.12 sd = 3,839.02 mean = 74,124.87 sd = 4,062.50 mean = 76,095.71 sd = 4,227.54 match each broker with the correct description. cathy amanda benjamin for which broker does 68% of the data lie between $70,062.37 and $78,187.37 (1 sd from the mean)? arrowboth for which broker does 95% of the data lie between $67,785.08 and $83,141.16 (2 sd from the mean)? arrowboth which broker had the highest average monthly commission during the past year? arrowboth

Ответ:

badaxz

01.02.2021

Mathematics

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x²+10x+41=0

using x=(-b±√b²-4ac)½

where a= 1

b=10

c=41

x= (-10±√10²-4×1×41)½

x=-5 ± √(100-164)

x=-5±√(-64)½

x=-5±4i

x=-5+4i or -5-4i  

where i= √-1

ANSWER: x=-5+4i or -5-4i  

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