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AlekseyPX
3 years ago
6

X - y = 8 and -x + y = 4 solve the equation of linear equations by substitution​

Mathematics
1 answer:
ch4aika [34]3 years ago
7 0

Answer:

No solution

Step-by-step explanation:

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A simple random sample of size n=40 is obtained from a population with a mean of 20 and a standard deviation of 5. Is the sampli
gulaghasi [49]

If the sample size is n=40 ,mean of 20 and a standard deviation then the sampling distribution is normally distributed.

Given sample size is 40, sample mean is 20, sample standard deviation is 5.

We have to find whether the distribution is normally distributed or not.

Normal distribution is an arrangement of a data set in which most values cluster in the middle of the range and the rest taper off simultaneously towards either extreme. It may be one tailed or two tailed also.

Yes the given distribution whose sample size is 40, sample mean of 20 and sample standard deviation of 5 is normally distributed as the sample size is greater than 30.

Signs of normal distribution are:

  • Symmetric bell shape
  • mean and median are equal both located at the center of the distribution
  • 68% approximately equals 68% falls within 1 standard deviation of the mean.

Hence the sampling distribution is normally distributed.

Learn more about normal distribution at brainly.com/question/4079902

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6 0
2 years ago
What is the side length of the smaller square plate on which 36 CM chopstick can fit along a diagonal without any overhang
HACTEHA [7]

Step-by-step explanation:

2

57

65

566

77788

66777

66788

67899

6789

78899

789999

88889

8888888

788889

888888999999999

6 0
2 years ago
Communicative property
dezoksy [38]

The commutative property is a math rule that says that the order in which w multiply numbers does not change the product  

8*2=16 or 2*8=16

So,2*8=8*2


7 0
2 years ago
Pythagorean Theorem - Distance Formula - Item 20760
erma4kov [3.2K]

Step-by-step explanation:

x1 = -5, x2 =3 , y1 = -4 , y2=1

  1. formula = square foot of (x2 -x1)^2 + (y2 -y1)^2
  2. sqare root of (3 +5)^2 + (1 +4)^2
  3. square root of (8)^2 + (5)^2
  4. square root of 64 + 25
  5. square root of 89
  6. = 9.43

6 0
2 years ago
9a - ab + 5b<br><br>if a = 2 and b = 7​
Anit [1.1K]
9a-ab+5b
9(2)-(2)(7)+5(7)
18-14+35
39
8 0
2 years ago
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