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musickatia [10]
3 years ago
8

Which of the following best describes the change in the mean when 1213 is included in the data set below?

Mathematics
1 answer:
Kruka [31]3 years ago
5 0

Answer:

Step-by-step explanation:

Given in the data set as

26, 34, 38, 49, 65, 76, 81

Sum = 369

No of entries = 7

Mean =52.71

When 1213 is included

New sum = 1582

No of entries =8

New mean = 197.75

Thus mean increases by 145.04

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AB = x + 15 DC = 4x AD = x + 10 BC = ? Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show
dexar [7]

Answer:

BC=15\ units

Step-by-step explanation:

we know that

In a parallelogram opposite sides are congruent

In this problem

we have that

AB and DC are opposite sides

AD and BC are opposite sides

so

AB=DC

AD=BC

step 1

Find the value of x

AB=DC

substitute the given values

x+15=4x

solve for x

4x-x=15

3x=15

x=5\ units

step 2

Find the length of AD

we have that

AD=x+10

substitute the value of x

AD=5+10=15\ units

step 3

Find the length of BC

Remember that

AD=BC ----> by opposite sides

therefore

BC=15\ units

6 0
3 years ago
A) what is 42%of 250? please explain the method......​
arsen [322]

Answer:

105

Step-by-step explanation:

What is 42% of 250?

Let's break this question down.

We have:

42% – A percent is a fraction out of 100. 100% being fully complete. We can express 42% as 42/100 or 0.42.

of – This symbolizes multiplication.

250 – This is our total.

Now let's set up an equation.

42% of 250

0.42 • 250 = ?

Now, multiply.

105

This is your answer.

42% of 250 is 105.

Hope this helps!

4 0
2 years ago
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andrew-mc [135]

Answer:

the answer is r<1 that's the inequality

5 0
3 years ago
Hong needs to memorize words on a vocabulary list for Russian class. He has 14 words to memorize, and he is one-half done. How m
GREYUIT [131]

Step-by-step explanation:

He has done one half = ½

Finding ½ of 14

½ × 14

7

Hence, Hong has memorized 7 words

5 0
2 years ago
Tell what each of the residual plots below indicates about the appropriateness of the linear model
ELEN [110]
The closer the points are/more uniform they are to the residual line, the better the fit.  The more skewed and scattered they are, the model is a worse fit.
3 0
3 years ago
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