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sweet [91]
3 years ago
12

THANKS PLEASE ONLY ANSWER IF YOU KNOW

Mathematics
2 answers:
irinina [24]3 years ago
7 0
B^2 - 6b + 9
4^2 - 6(4) + 9
16 - 24 + 9
1 
Hope this helps!

Burka [1]3 years ago
4 0
25 is the answer because 4 to the second power is 8 and then six times four is 24 then subtract 24 - 8 then add 9 and you will get 25!
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From all those aforementioned, the true statement is: Thanh’s grade is 2.5 standard deviations below the mean of the test grades. 
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kirill115 [55]

Answer:

(-1,-1)

Step-by-step explanation:

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MINING A mine produces 42.5 tons of coal per hour. How much coal will the mine produce in 9.5 hours?
vladimir1956 [14]

Given

MINING A mine produces 42.5 tons of coal per hour.

Find out the how much coal will the mine produce in 9.5 hours.

To proof

As given in the question

A mine produces 42.5 tons of coal per hour i.e in the 1 hour mine produces the 42.5 tons .

Let us assume that the coal produce in the 9.5 hours be x.

than the equation becomes

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7 0
3 years ago
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The average of a distribution is equal to the summation of x divided by the number of observations is called
bekas [8.4K]

Answer :

<h3>The average of a distribution is equal to the summation of x divided by the number of observations is called <u>Mean</u></h3>

Step-by-step explanation:

<h3>The average of a distribution is equal to the summation of x divided by the number of observations is called <u>Mean</u></h3><h3>For :</h3>
  • We know that The average (Mean)=\frac{sum of the observations}{Number of observations}
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<h3>Therefore the average of a distribution is known as Mean.</h3>
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