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pentagon [3]
3 years ago
13

In problems like -20≤5y, when you divide by 5 do you reverse the symbol because -20 is negative?

Mathematics
2 answers:
vampirchik [111]3 years ago
8 0
No, you only reverse the symbol when the divisor is negative
vitfil [10]3 years ago
8 0

No, you only reverse the symbol if you multiply or divide a negative number to both sides of the inequality.

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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
The general solution of e x cosydx−e x sinydy=0 is :__________
Natasha2012 [34]

Answer:

General solution    x   = log | sec y | + C            

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given

          e^{x} cosy dx - e^{x} sin y d y = 0

         e^{x} (cosy dx = e^{x}  sin y d y

           cos y dx = sin y d y

                dx = tan y d y

<u><em>Step(ii)</em></u>:-

now integrating on both sides , we get

            \int\limits {1} \, dx  = \int\limits {tany} \, dy

by using formula

               \int\limits {tany} \, dy = log | sec y | + C

             x   = log | sec y | + C

<u><em>Final answer:</em></u>-

General solution    x   = log | sec y | + C

           

     

       

7 0
3 years ago
Which statement is true about the relative areas of triangle ABC and triangle XYZ is true
Nata [24]

Answer:

The answer is A

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
One-third of a number, decreased by six equals eight. what is the number
pentagon [3]
Let the number be y.

One third of y = (1/3)*y = y/3

This is decreased by 6;         y/3  - 6

And it equals 8

That means:

y/3 - 6 = 8

y/3 = 8 + 6

y/3 = 14

y = 3*14

y = 42

The number is 42.

I hope this helps.
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Friend on F o r t n i t e<br> Username is farmboycaleb<br> brainlist if done
jekas [21]

Answer:

okj

Step-by-step explanation:

6 0
3 years ago
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