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VikaD [51]
3 years ago
6

Need help ASAP !!!!!

Mathematics
1 answer:
AnnyKZ [126]3 years ago
8 0
What do you need help with?
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Which statement is an example of the reflexive property of congruence?
marusya05 [52]
C. EFG = EFG



The reflexive property allows you to change the order as long as they are the same.
3 0
4 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

and \bar{x_2},n_2 be the mean and no of measurements in second case

\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
The number of visitors to a certain Web site triples every month. The number of visitors is modeled by the expression 300 •3m​,
muminat
We have that   <span>
</span>
the expression is (300)*(3^m)

for m=-1
​(300)*(3^-1)---------> (300)*(1/3)=100

The value of expression at m=-1 is 100, so there were 100 visitors 1 months before the number of visitors was measured


7 0
4 years ago
I need the answer I only solved half of this help pls f (n)=n/2 3n +1 if n is even if n is odd
tamaranim1 [39]

Answer:

It is not odd

Step-by-step explanation:

7 0
3 years ago
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Evaluate the expression if x= 15, y = 5, and z = 3<br><br> x/z+ 2y
dedylja [7]
(15/3)+2(5)

5+10

15

The answer is going to be 15
6 0
3 years ago
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