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2 years ago

40 points!

Mathematics

2 answers:

Step2247 [10]2 years ago

5 0

Complementart angles

Dafna1 [17]2 years ago

3 0

Answer:

yes is is the only thing I come from here to the farm to work with me and I will not let it is a problem

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An expression is given: 2 open parentheses square root of k minus 1 close parenthesis plus square root of 8. If on adding negati

neonofarm [45]

Answer:

Possible value of k is √2

Step-by-step explanation:

The information given are;

The expression, 2·(√k - 1) + √8 to which may be added -6·√2 to obtain a rational number, we therefore have;

2·(√k - 1) + √8 - 6·√2 = R

Therefore, simplifying gives;

2·√k - 2 + 2·√2 - 6·√2 = 2·√k - 2 - 4·√2 = R

2·√k - 2 - 4·√2 + 2= R + 2 = R

2·√k - 2+ 2 - 4·√2 = R

2·√k + 0 - 4·√2 = 2·√k - 4·√2 = 2·(√k - 2·√2) = R

(√k - 2·√2) = R/2 = R

Therefore, √2 is a factor of √k such that √k - 2·√2 = R

Which gives k = x·√2, where x = a rational number

When x = 1, k = √2.

Therefore, a possible value of k is √2

3 0

2 years ago

How do you find parametric equation for line with slope -2, passing through the point P(-10, -20)?

olga_2 [115]

Y=-2x-40 will be equation

8 0

2 years ago

The dot plot shows how many games of chess 8 different members of the chess club played in one month. If Jackson is a new member

stira [4]

Answer:

Step-by-step explanation:

8 0

2 years ago

The lengths of text messages are normally distributed with an unknown population mean. A random sample of text messages is taken

anygoal [31]

Answer:

95% of the text messages have length between 23 units and 47 units.

Step-by-step explanation:

We are given the following in the question:

The lengths of text messages are normally distributed.

95% confidence interval:

(23,47)

Thus, we could interpret the confidence interval as:

About 95% of the text messages have length between 23 units and 47 units.

By Empirical rule for a normally distributed data, about 95% of data lies within 2 standard deviations of mean , thus we can write:

$\mu - 2\sigma = 23\\\mu +2\sigma = 47\\\Rightarrow \mu = 35\\\Rightarrow \sigma = 6$

Thus, the mean length of text messages is 23 units and standard deviation is 6 units.

8 0

2 years ago

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Len bought 12.3 ounces of cashews and 15.2 ounces of almonds. He calculates that if he and four friends share all the nuts equal

ANTONII [103]

Answer:

trgh

Step-by-step explanation:

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2 years ago