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Naddika [18.5K]
2 years ago
7

Three sets of a sum of a number and four are added to the sum of seven times the same number and thirteen.

Mathematics
1 answer:
timofeeve [1]2 years ago
7 0
9.33 might be the answer I'm not entirely sure
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Each score in a set of data is multiplied by 3, and then 4 is subtracted from the result. If the original mean is 10 and the ori
olganol [36]

The new mean and standard deviation is 26 and 15, when each score in data set is multiplied by 5 and then 7 is added.

According to the question,

Original mean is 10 and original standard deviation is 5 . In order to find to new mean and standard deviation when each score in data set is multiplied by 5 and then 7 is added.

First "change of scale" when every score in a data set is multiplied by a constant, its mean and standard deviation is multiplied by a same constant.

Mean: 10*3 = 30

Standard deviation: 5*3 = 15

Secondly "change of origin" when every score in a data set by a constant, its mean get  added or subtracted by the same constant and standard deviation remains constant.

Applying change of origin in the above mean and standard deviation  

Mean: 30 - 4 = 26

Standard deviation: Remains same = 15

Hence, the new mean and standard deviation is 26 and 15, when each score in data set is multiplied by 5 and then 7 is added.

Learn more about Mean and standard deviation here

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2 years ago
Which pair of ratios is equivalent?
sweet-ann [11.9K]

Answer:

The answer is option A.

Hope this helps.

8 0
3 years ago
For each equation choose a value for x and then solve
ss7ja [257]

Answer:

Step-by-step explanation:

For each equation choose a value for x and then solve to find the corresponding y value that makes that equation true.

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2 years ago
Three consecutive even integers whose sum is -48​
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Three consecutive even integers whose sum is -48
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3 years ago
Andrew is flying a kite held by 175 meters of string that makes an angle of elevation with the ground of 40. Emma is standing di
Alja [10]

Answer:

x=134.05m

Step-by-step explanation:

From the question we are told that:

Slant Height of Kite h_s=175

Angle \theta=40 \textdegree

Since Emma,The Kite and Andrew forms a right angle triangle

Generally the equation for distance between Andrew from Emma is mathematically given by

 x=h_scos\theta

 x=175cos40

 x=134.05m

8 0
3 years ago
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