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Novosadov [1.4K]
3 years ago
13

Find the value of each variable. Write your answers in simplest form.

Mathematics
1 answer:
hodyreva [135]3 years ago
8 0

Answer:

q = 16 \sqrt{2} and r = 16

Step-by-step explanation:

We know that

  • \sin( \alpha )  =  \frac{side \: opposite \: to \:  \alpha }{hypotenuse \: of \: triangle}
  • \cos( \alpha )  =  \frac{side \: adjacent \: to \:  \alpha }{hypotenuse \: of \: traingle}
  • \tan( \alpha )  =  \frac{side \: opposite \: to \:  \alpha }{side \: adjacent \: to \:  \alpha }

where \alpha is an angle of a triangle.

In the triangle given above , \alpha = 45°. So,

1) \sin( 45)  =  \frac{16}{q}

=  >  \frac{1}{ \sqrt{2} }  =  \frac{16}{q}

=  > q = 16 \sqrt{2}

2) \tan(45)  =  \frac{16}{r}

=  > 1 =  \frac{16}{r}

=  > r = 16

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george wanted to measure the angle of a waterslide at the lake .he used a sheet of folded paper that formed 20 degree angle. he
evablogger [386]

Answer:

It's not clear on what it means but the information given it would just be 20*3=60

Step-by-step explanation:

4 0
3 years ago
I rlly need help with this :(
kobusy [5.1K]

Using the normal distribution, it is found that:

a) The pilot is at the 72th percentile.

b) 19.13% of pilots are unable to fly.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 72.6, \sigma = 2.7.

Item a:

The percentile is the <u>p-value of Z when X = 74.2</u>, hence:

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

Z = \frac{74.2 - 72.6}{2.7}

Z = 0.59

Z = 0.59 has a p-value of 0.7224.

72th percentile.

Item b:

The proportion that is able to fly is the <u>p-value of Z when X = 78 subtracted by the p-value of Z when X = 70</u>, hence:

X = 78:

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

Z = \frac{78 - 72.6}{2.7}

Z = 2

Z = 2 has a p-value of 0.9772.

X = 70:

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

Z = \frac{70 - 72.6}{2.7}

Z = -0.96

Z = -0.96 has a p-value of 0.1685.

0.9772 - 0.1685 = 0.8087 = 80.87%.

Hence the percentage that is unable to fly is:

100 - 80.87 = 19.13%.

More can be learned about the normal distribution at brainly.com/question/4079902

#SPJ1

3 0
2 years ago
Which equations are true when the value of x is 4
Arada [10]
4x1= 4 easy ......correct
7 0
3 years ago
Peggy had four times as many quarters as nickels. She had $2.10 in all. How many nickels and how many quarters did she have?
kari74 [83]
For the answer to the question above, 
and we are told that there are "four times as many quarters as nickels"
this translates to
q = 4n

0.05n + 0.25q = 2.10
and
q = 4n
are your two equations that could be used to solve this problem


if you would like to know how many nickels and how many quarters there are, plug in q = 4n into the first equation and get
0.05n + 0.25(4n) = 2.10
then I would stop here
because I didn't see the choices. So the answer is 4n
8 0
3 years ago
9. Kelly rode her bike 3 miles less than twice the number of miles Jon rode. Together
prohojiy [21]

Answer:

Jon rode <u>17 miles</u> and Kelly rode <u>31 miles</u>.

Step-by-step explanation:

Given:

Kelly rode her bike 3 miles less than twice the number of miles Jon rode.

Together  they rode 48 miles.

Now, to find the miles they each ride.

<em>Let the number of miles Jon rode be </em>x.<em />

<em>So, the number of miles Kelly rode is</em> 2x-3.

Together they rode = 48 miles.

Now, to get the miles they each rode:

According to question:

x+(2x+3)=48

x+2x-3=48

3x-3=48

<em>Adding both sides by 3 we get:</em>

3x=51

<em>Dividing both sides by 3 we get:</em>

x=17.

<em>Jon rode = 17 miles.</em>

So, to get the miles Kelly rode we substitute the value of x:

<em>And Kelly rode = </em>2x+3<em />

=2\times 17-3

=34-3

=31\ miles.

Therefore, Jon rode 17 miles and Kelly rode 31 miles.

6 0
4 years ago
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