Which triangles are congruent

Mathematics

1 answer:

Anarel [89]3 years ago

8 0

Answer:

I don’t see any triangles to tell you

Step-by-step explanation:

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An online bookstore sells all paperback books for x dollars each. Aidan bought 7 paperback books and spent $3.95 on shipping. Ni

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Answer:

Here's the answer

Step-by-step explanation

y= 18x+9.20

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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 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:

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:

 $P(X)={ ^nC_xp^x(1-p)^{n-x}} \\ \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\ \\ =1(1)(0.98)^{30}=0.5455$


Part B:

The mean of a binomial distribution is given by

 $\mu=np \\ \\ =30(0.02) \\ \\ =0.6$

The standard deviation is given by:

 $\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\ \\ =0.7668$


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.

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3 years ago

For every gallon of water in a swimming pool, you’ Instructed to add four grams of chlorine. How many grams of chlorine would yo

Kruka [31]

Answer:

Step-by-step explanation:

Multiply grams per gallon times gallons to get grams.

$4\,\dfrac{g}{gal}\times 13\,gal=4\times 13\,\dfrac{g\cdot gal}{gal}=52\,g$