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lilavasa [31]
3 years ago
10

Can someone help me 10 points

Mathematics
1 answer:
Elanso [62]3 years ago
3 0

The two angles form a right triangle which is 90 degrees.

Add the two to equal 90:

3x-8 + 4x = 90

simplify:

7x-8 = 90

Add 8 to both sides:

7x = 98

Divide both sides by 7:

x = 14

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31,680 ft = mi<br> A. 6 <br> B. 18 <br> C. 60 <br> D. 2,640
Vlad1618 [11]
5280 feet = 1 mile
31,680 feet = x miles

31,680/5,280 = 6

31,680 feet = 6 miles.

Your answer is A. 6.
6 0
2 years ago
Help me ASAP I’ll give brainliest!
lora16 [44]

Answer:

sorry i dunno

Step-by-step explanation:

4 0
3 years ago
Use the formula to find
Marizza181 [45]

Answer:

5525

Step-by-step explanation:

Using the formula with n = 25 , then

\frac{25(26)(50+1)}{6}

= \frac{25(26)(51)}{6}

= \frac{33150}{6}

= 5525

5 0
2 years ago
The length of the human pregnancy is not fixed. It is known that it varies according to a distribution which is roughly normal,
fgiga [73]

Answer:

a) Figure attached

b) P(234

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(234

And we can find this probability with this difference:

P(-2

An we know using the graph in part a that this area correspond to 0.95 or 95%

c) P(250

And we can find this probability with this difference:

P(-1

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

d) P(X

And using the z score we got:

P(X

And that correspond to approximately 0.15%

Step-by-step explanation:

Part a

For this case we can see the figure attached.

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part b

Let X the random variable that represent the length of human pregnancy of a population, and for this case we know that:

Where \mu=266 and \sigma=16

We are interested on this probability

P(234

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(234

And we can find this probability with this difference:

P(-2

An we know using the graph in part a that this area correspond to 0.95 or 95%

Part c

P(250

And we can find this probability with this difference:

P(-1

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

Part d

We want this probability:

P(X

And using the z score we got:

P(X

And that correspond to approximately 0.15%

5 0
3 years ago
HELP NEED IT PLEASE UGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
ra1l [238]

Answer:

15

Step-by-step explanation:

to get sides JK and ML, you have to use ratios. the ratio is 3:2 so therefor ml and jk are 4.5

Then you add 4.5 and 4.5 and 3 and 3 to get you 15

3 0
2 years ago
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