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PolarNik [594]
3 years ago
10

How do I solve this?

Mathematics
1 answer:
borishaifa [10]3 years ago
3 0

3x + 12 = 18  subtract 12 from both sides

3x=6 then we divide 3 from both sides

x=2 you could even try it for 5x-3 =7, <u>but the value of x is: x=2 </u>

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2 years ago
2x-7=117 what is the value of x
Tcecarenko [31]

2x - 7 = 117

Add 7 to both sides

7 + 2x - 7 = 117 + 7

At the left hand side 7 will cancel 7

At the right hand side 7 will add up

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Martin earned the following scores on his last five tests.
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IQR= 18 is the interquartile range of his scores.
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3 years ago
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Answer:

1,462.50

Step-by-step explanation:

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4 0
2 years ago
The average college lecture hall (auditorium) can seat 60 students with a standard deviation of 21. Assume that a total of 60 le
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Answer:

The standard deviation of the sample mean is  \sigma _ {\=  x } = 2.711

Step-by-step explanation:

From the question we are told that

   The mean is  \= x  =  60

    The standard deviation is  \sigma  =  21

     The sample size is n  =  60

Generally the standard deviation of the sample mean is mathematically represented as  

               \sigma _ {\=  x } =  \frac{\sigma  }{\sqrt{n} }

substituting values

               \sigma _ {\=  x } =  \frac{ 21 }{\sqrt{60} }

               \sigma _ {\=  x } = 2.711

4 0
2 years ago
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