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2 years ago

12

The average time between infection with the AIDS virus and developing AIDS has been estimated to be 8 years with a standard devi

ation of about 2 years. Approximately what fraction of people develop AIDS within 4 years of infection

1 answer:

Dahasolnce [82]2 years ago

3 0

Answer:

1/40

Step-by-step explanation:

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A positive integer is twice another.the sum of the reciprocal of the two positive integer is 3/14. Find the integers

icang [17]

Answer:

$\huge\boxed{14\ \text{and}\ 7}$

Step-by-step explanation:

$n,\ m-\text{positive integer}\\\\n=2m-\text{a positive integer is twice another}\\\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}-\text{the sum of the reciprocal of the two positive integer is }\ \dfrac{3}{14}\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}n=2m&(1)\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}&(2)\end{array}\right$

$\text{Substitute (1) to (2):}\\\\\dfrac{1}{2m}+\dfrac{1}{m}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{1\cdot2}{m\cdot2}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{2}{2m}=\dfrac{3}{14}\\\\\dfrac{1+2}{2m}=\dfrac{3}{14}\\\\\dfrac{3}{2m}=\dfrac{3}{14}\Rightarrow2m=14\qquad\text{divide both sides by 2}\\\\\dfrac{2m}{2}=\dfrac{14}{2}\\\\\boxed{m=7}$

$\text{Substitute it to (1):}\\\\n=2\cdot7\\\\\boxed{n=14}$

8 0

2 years ago

Gotta go back to school today..

PIT_PIT [208]

Answer:

I believe its 33.60 because if you add up 33.+5% that would give you 33.6 so its 33.60

Step-by-step explanation:

Hope its right

3 0

3 years ago

A store owner decided to collect data on his customers. On one day he observed:

Mnenie [13.5K]

Answer:

Johannes Gutenberg - Wikipediahttps://en.wikipedia.org › wiki › Johannes_Gutenberg

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2 years ago

10. Please help. What is the length of ED⎯⎯⎯⎯⎯⎯⎯⎯?

DedPeter [7]

Answer:

The correct value is 12.

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2 years ago

A 6-pound bag of birdseeds cost $4.92. What is the unit price?

Sergeu [11.5K]

I think you would have to multiply $4.92 and 6... if so the answer would be $29.52 for the unit price.

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3 years ago