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Debora [2.8K]
4 years ago
10

Which property does x2+2x=2x+x^2

Mathematics
1 answer:
Naya [18.7K]4 years ago
8 0
Im pretty sure its the commutative property.
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Listed below are the measured radiation emissions​ (in W/kg) corresponding to cell​ phones: A,​ B, C,​ D, E,​ F, G,​ H, I,​ J, a
Sophie [7]

Answer: a. Mean = 0.696364

b. Median = 0.64

c. Midrange = 0.895

d. There is no Mode

e. 2. The maximun data value is the most relevant statistic, because it is closest to the limit of 1.6W/kg and that cell should be avoided.

Step-by-step explanation:

a) Mean is an average number of the data set, calculated by the sum of all the value divided by the quantity of the set:

mean = \frac{0.75+0.22+1.23+0.64+0.54+0.24+0.81+1.57+0.29+1.02+0.35}{11}

mean = 0.696364

b) Median is the middle number in the list of numbers. In this case, since there are 11 elements in the set, the middle number is:

sorted numbers of the data set:

0.22 0.24 0.29 0.35 0.54 0.64 0.75 0.81 1.02 1.23 1.57

median = 0.64

c) Midrange is another type of average number. It is calculated as:

midrange = \frac{high+low}{2}

midrange = \frac{1.57+0.22}{2}

midrange = 0.895

d) Mode is the number that appears most often in the list of numbers. For this data set, each number appears only one time, so there is no mode.

Mode = 0

e) According to the question, cell phone radiation is dangerous when it is higher than 1.6W/kg. The cell phone with the maximum data value (1.57 W/kg) should be avoided, since it is too close to the limit described.

So, the measures of center are not the most important statistic to be observed but the maximum data value.

7 0
3 years ago
Find the 12th term in the following geometric sequence. 0.75, 1.5, 3, 6, . . .
DochEvi [55]
We know that this is a geometric sequence.  Keep in mind that in a geometric sequence, the next term is found by shamelessly multiplying it by "some number", namely the "common ratio".

therefore, if you divide any "next term" by the "previous term", the quotient will just be that "some number", thus, if 1.5 ÷ 7.5 will give it to us, and is, yeap, you guessed it, is 2.

you can check say 3 ÷ 1.5 or 6 ÷ 3, you'll see it.

so, we know the common ratio is 2, and the first term is 0.75, so

 \bf n^{th}\textit{ term of a geometric sequence}\\\\
a_n=a_1\cdot r^{n-1}\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
r=2\\
a_1=0.75\\
n=12
\end{cases}
\\\\\\
a_{12}=0.75\cdot 2^{12-1}\implies a_{12}=0.75\cdot 2^{11}\implies a_{12}=1536
4 0
3 years ago
80 members decreased by 40%
aleksklad [387]
The answer would be 48 because....
 
First, you would multiply 80 and .40 (changed the percentage to decimal) which is 32

Then, subtract 80 and 32 to get 48
6 0
3 years ago
Destiny makes earrings and bracelets to sell. She makes a profit of $15 for
asambeis [7]

Answer:

$135

Step-by-step explanation:

She would make 9 pairs of earrings, they have the least cost and the highest profit. No other combination would yield a higher profit.

5 0
3 years ago
A 2-column table with 5 rows. The first column is labeled x with entries negative 2, negative 1, 0, 1, 2. The second column is l
Ira Lisetskai [31]

Answer:

It's B

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
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