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Karo-lina-s [1.5K]
3 years ago
8

Jeremiah saving money from a tutoring job after the first three weeks he saved $135 assume the situation is proportional use the

unit rate to write an equation relating the amount saved us to the number of weeks W worked at this rate how much with Jeremiah save after eight weeks
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
7 0

Answer:

$360 after 8 weeks

Step-by-step explanation:

135/3=45

45x8=360

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3 years ago
Which formula is used to calculate the standard deviation of sample data?
Cloud [144]

Answer:

s = sqrt [ Σ ( x i - x ) 2 / ( n - 1 ) ]

Step-by-step explanation:

where s is the sample standard deviation, x is the sample mean, x i is the ith element from the sample, and n is the number of elements in the sample. And finally, the standard deviation is equal to the square root of the variance.

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<img src="https://tex.z-dn.net/?f=5x%20%7B%7D%5E%7B2%7D%20%5Cdiv%20%5Csqrt%7B2%20%7D%20%3D%20164" id="TexFormula1" title="5x {}^
umka2103 [35]

Answer:

The short answer is : x=6.81

Step-by-step explanation:

First thing to do is multiply in\sqrt{2}

<h3>To Until it become :</h3>

5x {} ^{2} =164 * \sqrt {2}

Now we will divided on 5 and calculate the numper to it equal 46.3

Then you will take square root To the two parties

To equal in the end =6.81

6 0
3 years ago
Six different​ second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re
mixer [17]

Answer: range= 26, variance= 80 and standard deviation= 8.94

Step-by-step explanation:

Range = highest - lowest

Range = 146 - 120

Range= 26

Let m be mean

M=mean=sum/n

Mean=(120+134+146+127+138+133) / 6

M=798/6

M=133

The standard deviation sample formula:

S.D = sqrt( Summation of |x-m|^2 / n-1)

Let start finding:

|x-m|^2

For 1st: |120-133|^2=169

For 2nd: |134-133|^2=1

For 3rd: |146-133|^2=169

For 4th: |127-133|^2=36

For 5th: |138-133|^2=25

For 6th: |133-133|^2=0

Summation of |x-m|^2 = 400

The standard deviation formula is :

S.D = sqrt( Summation of |x-m|^2 / n-1)

S.D= sqrt(400 / 5)

S.D=sqrt(80)

S.D= 8.94

Variance = (Summation of |x-m|^2 / n-1)

Variance= 400/5

Variance= 80

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M∠3 + m∠6 =180° True or False?
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