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Wittaler [7]
3 years ago
7

What two numbers add to 9 and multiply to negative 11

Mathematics
1 answer:
fiasKO [112]3 years ago
6 0
The two numbers are (9+ 5√5)/2 and (9- 5√5)/2.

(9+ 5√5)/2+ (9- 5√5)/2= 9
(9+ 5√5)/2* (9- 5√5)/2= -11

Hope this helps~
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<em>Step(I)</em>:-

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There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

 

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          P = \frac{n_{1}p_{1} +n_{2}  p_{2} }{n_{1}+n_{2}  }

         P =  0.920

Z= \frac{0.9230-0.9038}{\sqrt{0.920 X0.08(\frac{1}{390}+\frac{1}{52}  } )}

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Null hypothesis is accepted

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