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ziro4ka [17]
3 years ago
7

The mean of a data set of 3 numbers is 12. The mean of a data set of 9 numbers is 40. What is the mean of the combined data sets

?

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
6 0

<em>Hope</em><em> </em><em>t</em><em>h</em><em>i</em><em>s</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

laiz [17]3 years ago
5 0

Answer:

33.

Step-by-step explanation:

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1/4x -9= 1/3x - 16/3
topjm [15]

Answer:

33333333333

Step-by-step explanation:

488888888

3

3 0
3 years ago
Coins are marked with the letters A-G. What is the probability of selecting a coin with a vowel on it?
Lemur [1.5K]
A B C D E F G.

Out of these, 2/7 letters are vowels.

2 / 7 ≈ 0.286 
0.286 * 100 = 28.6%

Therefore the correct answer is A.
4 0
4 years ago
Read 2 more answers
Write an equation of the given line that passes through the given point and has the given slope m
Harman [31]

Answer:

y = 2x - 9

Step-by-step explanation:

Use slope intercept form, y = mx + b

Plug in the slope, x, and y, then solve for b:

y = mx + b

1 = 2(5) + b

1 = 10 + b

-9 = b

Then, plug in b and the slope into y = mx + b

y = mx + b

y = 2x - 9

So, the equation of the line is y = 2x - 9

5 0
3 years ago
Read 2 more answers
ANSWER AND EXPLAIN I’LL MARK BRAINLIEST PLEASE THANK YOU
Charra [1.4K]

Answer:

(x,y) = (2 - 1)

Step-by-step explanation:

2x - y = 5

5x + 2y = 8

y + 2x = 5

2y + 5 x = 8

(couldnt upload a pic)

I tried to answer as best as I can, please mark brainliest!

7 0
3 years ago
Find the value of x.
Airida [17]

Answer:

x = 10

Step-by-step explanation:

The 2 chords are equal in length so

7x + 5 = 9x - 15

2x = 20

x = 10

5 0
3 years ago
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