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kondaur [170]
4 years ago
9

Which statement MUST be true?

Mathematics
1 answer:
romanna [79]4 years ago
7 0
The answer is C

The reason being these two sets of angles are opposite angles (also known as vertical angles) and opposite angles are always congruent.
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HELP PLEASE ill give tons of poitns and brainlist
andre [41]

Answer:

x = 3.4

Step-by-step explanation:

Given the graphs of 2 functions, then the solutions to both are at their points of intersection, that is

where f(x) = g(x)

There are 3 possible points of intersection to f(x) = g(x)

The one on the list , however, is at x = 3.4

7 0
3 years ago
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A sample of 12 measurements has a mean of 16.5, and a sample of 15 measurements has a mean of 18.6. Find the mean of all 27 meas
Wewaii [24]

Answer: 17.67

Step-by-step explanation:

Given

Sample  of 12 measurements has a mean of 16.5 and

a sample of 15 measurements has a mean of 18.6

Take \bar{x_1},n_1 be the mean and no of measurements

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\therefore \bar{x_1}=\dfrac{\sum a_1}{n_1}\\\\\Rightarrow \sum a_1=\bar{x_1}\times n_1\\\\\Rightarrow \sum a_1=198\quad \ldots(1)

Similarly,

\therefore \bar{x_2}=\dfrac{\sum a_2}{n_2}\\\\\Rightarrow \sum a_2=\bar{x_2}\times n_2\\\\\Rightarrow \sum a_2=279\quad \ldots(2)

Mean of 27 measurements

\Rightarrow \bar{x_3}=\dfrac{\sum a_1+\sum a_2}{n_1+n_2}\\\\\Rightarrow \bar{x_3}=\dfrac{198+279}{12+15}\\\\\Rightarrow \bar{x_3}=\dfrac{477}{27}\\\\\Rightarrow \bar{x_3}=17.67

4 0
3 years ago
Lol pls help me<br> i give brainliest yes
Roman55 [17]

Answer:

9 goes in the two missing places

5 0
3 years ago
When is it easy to show if a set is closed or not closed?
Pani-rosa [81]

Answer:i think its if the dots are open they arent closed but if they are filled in its closed same with () and [] if its (x,y) then its not able to be used but if its [x,y] then it is able to be used

Step-by-step explanation:

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3 years ago
pls help. A granola mix sells for $8.99 a pound. Tung wants to buy a bag of granola mix that weighs 7.8 pounds. The bag of grano
lorasvet [3.4K]

Answer:

about 72 dollars

Step-by-step explanation

"about" tells us to round our numbers. Therefore, 7.8 becomes 8. As each pound is $8.99, we multiply the two and get 71.92, which is "about" 72.

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3 years ago
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