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3 years ago

How to solve this. it’s for angles

Mathematics

1 answer:

Wewaii [24]3 years ago

6 0

Answer:

x=36

Step-by-step explanation:

The angle right under 3x is 2x, because alternate exterior angles between parallel lines are equal. Those two angles add up to 180, because they are formed by a strait line intersecting with another straight line. This means that 5x = 180 or x=36.

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I really NEED HELP ITS A QUIZ HELP PLEASE.

zhannawk [14.2K]

It is 12ft
Explanation: answer c

5 0

3 years ago

A person's blood pressure is monitored by taking 4 readings daily. The probability distribution of his reading had a mean of 13

ss7ja [257]

Answer:

a) Mean = 133, Standard deviation = 2.5

b) Normal distribution

c) 0.0026

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 4

Mean = 133

Standard deviation = 5

a) Mean and the standard deviation of the sampling distribution of the sample mean for the four observations each day.

The sampling distribution has a mean equal to the population mean

$\bar{x} = \mu = 133$

The standard deviation of the sampling distribution is given by:

$\sigma_s = \dfrac{\sigma}{\sqrt{n}} = \dfrac{5}{\sqrt{4}} = 2.5$

b) Shape of the sampling distribution

Central limit theorem:

When a large sample is drawn from a normal distribution, then the distribution of sample means approaches a normal distribution.

Since the distribution is normal, the sampling distribution of the sample mean will be bell shaped and follow a normal distribution.

c) P(sample mean exceeds 140)

$P( x > 140) = P( z > \displaystyle\frac{140 - 133}{2.5}) = P(z > 2.8)$

$= 1 - P(z \leq 2.8)$

Calculation the value from standard normal z table, we have,

$P(x > 140) = 1 - 0.9974 = 0.0026$

0.0026 is the probability that the sample mean exceeds 140.

6 0

3 years ago

Solve for x.<br><br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B40%7D" id="TexFormula1" title="\frac{x}{40}" alt="\frac{

Rom4ik [11]

Answer:

The answer is C.

Step-by-step explanation:

In order to find x, you have to multiply both sides by 40 :

$\frac{x}{40} = 4$

$\frac{x}{40} \times 40 = 4 \times 40$

$x = 160$

6 0

4 years ago

Read 2 more answers

Select all the expressions equal to sin (30°). *

SOVA2 [1]

The trigonometric expression sin 30° will be equal to cos 60°. Then the correct option is E.

<h3>How to convert the sine of an angle to some angle of cosine?</h3>

We can use the fact that:

sin(θ) = cos(90 - θ)

To convert the sine to cosine (but the angles won't stay the same unless it's 45 degrees).

The trigonometric expression sin 30° will be equal to

The sin 30° can be written as

sin 30° = cos(90° - 30)

sin 30° = cos 60°

Then the correct option is E.

Learn more about sine to cosine conversion here:

brainly.com/question/1421592

#SPJ1

7 0

2 years ago

How do you write square root of 72 in algebra?

cupoosta [38]

You would have the square root symbol (called a radical) over the number 72. But if you mean to simplify it, you can keep in mind that 9 x 3 = 72 and the square root of 9 is 3, so then your answer would be

3(radical)3

Hope that's not too confusing!

8 0

3 years ago