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steposvetlana [31]
3 years ago
11

Which expression has a value of 1?

Mathematics
2 answers:
Ket [755]3 years ago
8 0

Answer:

x/x=1

Step-by-step explanation:

when divide any two things which are equal then the answer is 1!!!

myrzilka [38]3 years ago
7 0

Answer:

x/x=1

Step-by-step explanation:

is the answer to your problem :)

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The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


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
<span>

Part B:

The mean of a binomial distribution is given by

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The standard deviation is given by:

</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:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
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Solve this multi step equation: 8a + 2(1 - 5a) &lt; 20 (dash under &lt;)
Citrus2011 [14]
Okay. Basically, a is greater than or equal to 9.
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Divide by two on both sides
and switch around the greater than sign since you divided by a <span>-2
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<span>And if you check, -9 works, -8 works, and -10 doesn't work.</span>
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Answer:

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Step-by-step explanation:

x + y =36

x - y = 16

27 + 9 = 36

27 - 9 = 16

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