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elena-s [515]
3 years ago
11

Which ratio correctly describes Tan A

Mathematics
2 answers:
sergejj [24]3 years ago
5 0

Answer:

tan A = 1.76/1.88

Step-by-step explanation:

The value of tan A is calculated by dividing the opposite edge to neighbouring edge.

Alisiya [41]3 years ago
4 0

Answer:

Tan A=\frac{1.76}{1.88}

Step-by-step explanation:

Tan A=\frac{1.76}{1.88}

TanA is ratio of opposite side to adjacent side

hence, Tan A=\frac{perpendicular}{base}

          Tan A=\frac{1.76}{1.88} answer

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Enter the value for x that makes an equation 16= -4(x-1) +4 true
lions [1.4K]

Answer:

-2

Step-by-step explanation:

16= -4(x-1)+4

16 - 4 = -4x + 4

12 = -4x + 4

12 - 4 = -4x

8 = -4x

x = 8 ÷ -4

x = -2

6 0
3 years ago
Assume that females have pulse rates that are normally distributed with a mean of beats per minute and a standard deviation of b
snow_tiger [21]

Answer:

a) This is the p-value of Z when X = A subtracted by the p-value of Z when X = B.

b) P-value of Z when X = 76 subtracted by the p-value of X = 68.

c) Because the underlying distribution(pulse rates of females) is normal.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question:

Mean \mu, standard deviation \sigma.

standard deviation of beats per minute.

a. If 1 adult female is randomly​ selected, find the probability that her pulse rate is between A beats per minute and B beats per minute.

This is the p-value of Z when X = A subtracted by the p-value of Z when X = B.

b. If 4 adult females are selected, find the probability that they have pulse rates with a mean between 68 beats per minute and 76 beats per minute.

Sample of 4 means that we have n = 4, s = \frac{\sigma}{\sqrt{4}} = 0.5\sigma

The formula for the z-score is:

Z = \frac{X - \mu}{\sigma}

Z = \frac{X - \mu}{0.5\sigma}

Z = 2\frac{X - \mu}{\sigma}

This probability is the p-value of Z when X = 76 subtracted by the p-value of X = 68.

c. Why can the normal distribution be used in heartbeat even the sample side does not exceed 30?

Because the underlying distribution(pulse rates of females) is normal.

3 0
2 years ago
2 tan x<br>______<br>1+tan^2 x​
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Step-by-step explanation:

<h2> It's the expanded formula of </h2>

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5 0
3 years ago
Paula has buttons. she gives away 28 buttons. choose the expression that shows the number of buttons paula has left.
mamaluj [8]

Answer:

y = 28 - x

Step-by-step explanation:

The variable x represents how many buttons Paula had before giving 28 away and the variable y represents how many buttons she has now.

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Tori invests $1,500 into the stock market which earns 9% per year. In 20 years, how much will Tori's investment be worth if inte
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\bold{ANSWER:}
$8725

\bold{EXPLANATIONS:}

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2 years ago
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