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Nikolay [14]
3 years ago
9

Solve Systems of Equations Algebracallyy=x+2 y=-3x

Mathematics
1 answer:
Sphinxa [80]3 years ago
5 0

y = x + 2

y = -3x

Do y = -3x in y = x + 2

y = x + 2

-3x = x + 2

-3x - x = 2

-4x = 2

x = -2/4

x = -1/2

Now put x = -1/2 in y = -3x

y = -3x

y = -3.(-1/2)

y = 3/2

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The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of
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Answer:

(221.39, 300.61) and (255.2223, 266.7777)

Step-by-step explanation:

Given that X, the  lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 17 days

Middle 98% would lie on either side of the mean with probability ±2.33 in the std normal distribution on either side of 0

Corresponding we have x scores as

Between 261-2.33*17 and 261+2.33*17

i.e. in the interval = (221.39, 300.61)

If sample size = 47, then std error of sample would be

\frac{17}{\sqrt{47} }

So 98% of pregnancies would lie between

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8 0
3 years ago
40. A triangle is placed inside of a circle of radius 3x. The base of the
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Answer:

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Step-by-step explanation:

4 0
2 years ago
Find mean, median and mode of 140, 130, 90, 80, 60, 50, 30, 20, 10, 0
Alecsey [184]
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For the median you would arrange all the numbers in order from least to greatest and cancel one from the left and one from the right each time. Since there is no middle number, the closest would be 50 and 60. Thus you you add 50+60 and get 110 and then divide by 2 giving you 55.

For the mode, there is no mode because none of the numbers repeat more than once.

I hope this clarifies your doubt. :)
3 0
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Let:

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F = w * sin theta

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7 0
3 years ago
5 is 20 percent of what
miskamm [114]

Answer:25 is the answer

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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