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OLga [1]
3 years ago
8

Negative five teen divided by three

Mathematics
1 answer:
shutvik [7]3 years ago
6 0

Answer:

-5

Step-by-step explanation:

-15/3=-5

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Hii anyone mind helping me with this question :D
Digiron [165]
0.0045, Bc that negative exponent makes the decimal point move to the left!
4 0
2 years ago
A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

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

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
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
<span>

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>
5 0
3 years ago
Which would be an equivalent way to write y= 2 - 3x ?
Fudgin [204]
The answer is B, because the numbers in the equation are 2, and -3x. The signs have to stay with the numbers they are with. So if you move the 3 to the front you have to keep the negative with it.
6 0
2 years ago
Which student spends the most time at the beach? <br>is this a statistical question?
KonstantinChe [14]

Answer:

yea

Step-by-step explanation:

cuz then there would be a graph and stuff and you would analyze which student spends more time

8 0
3 years ago
Read 2 more answers
Xx squared - XY + x squared - xy ​
EastWind [94]

Answer and Step-by-step explanation:

x^{2} - xy + x^{2} -xy\\\\2x^{2} -2xy

This is the answer.

4 0
2 years ago
Read 2 more answers
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