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wolverine [178]
3 years ago
7

Find standard deviation 22,25 30 35 40 45 48​

Mathematics
1 answer:
poizon [28]3 years ago
8 0

Answer:

To calculate the standard deviation of those numbers:

Work out the Mean (the simple average of the numbers)

Then for each number: subtract the Mean and square the result.

Then work out the mean of those squared differences.

Take the square root of that and we are done!

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What is the Algebraic Notation for this reflection?
Aleks [24]
B

Your y coordinates do not change, but your x coordinates are opposites
7 0
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A simple random sample of 64 8th graders at a large suburban middle school indicated that 88% of them are involved with some typ
ZanzabumX [31]
The margin of error of a 98% confidence interval is given by


ME=2.33\left(\sqrt{ \frac{p(1-p)}{n} }\right) \\  \\ =2.33\left(\sqrt{\frac{0.88(1-0.88)}{64}}\right) \\  \\ =2.33\left(\frac{0.1056}{64}\right)=2.33(0.0406) \\  \\ =0.0946
5 0
3 years ago
Plssssss helpp :'Dd<br> If JL = 5x + 1 and MK = 8x - 32, find JL and NK.<br><br> JL =<br><br> NK =
marysya [2.9K]

Answer:

  • 56 units, 28 units

Step-by-step explanation:

<u>Rectangle has equal diagonals:</u>

  • JL = MK

<u>Substitute and solve for x:</u>

  • 5x + 1 = 8x - 32
  • 8x - 5x = 1 + 32
  • 3x = 33
  • x = 11

<u>Find the length of the diagonals:</u>

  • JL = MK = 5*11 + 1 = 56 units

<u>Diagonals of the rectangle bisect each other:</u>

  • KN = MK / 2 = 56/2 = 28 units
5 0
3 years ago
Read 2 more answers
A boy wants to jump onto a carousel that is spinning at a rate of 14 revolutions per minute. If the carousel is 23 feet in diamt
nirvana33 [79]

Answer:

16.86 ft/s

Step-by-step explanation:

Given that

Speed of the carousel, s = 14 rpm

Distance from the carousel, d = 23 ft

To start with, we convert the given speed to revolution per second, so that

s = 14/60 rev/sec

To find the needed speed, we use the formula

v =2πnR, remember that Diameter = 2R, so we substitute D for 2R and get πnD

v = πnD, and we use this to find our needed velocity

v = 3.142 * 14/60 * 23

v = 72.266 * 14/60

v = 16.86 ft/s

Therefore the boy must run at a speed of 16.86 ft/s in order to be able to match the carousel and jump on it

6 0
3 years ago
Can you explain how to do this math problem?
d1i1m1o1n [39]

Since the problem is 2x^2-5xy-y^3 we first have to plug in what the x and y stands for, once you do that your problem should look like this:

2(-3)^2- 5(-3)(-2)- (-2)^3

Now take the parentheses away and when you do that your signs change.

2x3^2-5x(-3)x(-2)-(-2)^3    

do it again with -5x(-3)x(-2)

2x3^2-30-(-2)^3

now do this with (-2)^3

2x3^2-30-(-8)

Now evaluate the power

3^2 becomes 9

2x9-30-(-8)

then change -(-8) to a positive since two negatives make a positive

2x9-30+8

Now multiply the numbers 2x9

18-30+8

Then do 18-30 which equals -12 then add 8

Now you are left with your answer:

<u>-4</u>


Hope this helps! :3


6 0
3 years ago
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