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stiv31 [10]
3 years ago
5

Y(y + 4) - y 2 = 6 is a quadratic equation. True or False

Mathematics
2 answers:
Maksim231197 [3]3 years ago
6 0
FALSE,\ because:\\\\y(y+4)-y^2=6\\\\y^2+4y-y^2=6\\\\4y=6
Ugo [173]3 years ago
3 0
Y(y + 4) - y2 = 6
y2 + 4y - y2 = 6
4y = 6 ⇒ False
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Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
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Part B:

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</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
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</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
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Part C:

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