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Alexeev081 [22]
3 years ago
14

Pls help! Pls do this step by step . factorise: m^3-27​

Mathematics
1 answer:
Verdich [7]3 years ago
7 0

Answer:

m-3

Step-by-step explanation:

cube root the two to get m-3

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A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 1491 and the standard deviati
Alinara [238K]

Answer:

z(1910)=1.3429\\\\z(1230)=-0.9006\\\\z(2190)=2.2404\\\\z(1380)=-0.3558

Step-by-step explanation:

-Given the population mean is \mu=1491and  the standard deviation is \sigma=312, we calculate the z-scores using the formula:

z=\frac{\bar x-\mu}{\sigma}

#The z-score for 1910 can be calculated as:

z(1910)=\frac{x-\mu}{\sigma}\\\\=\frac{1910-1491}{312}\\\\=\frac{419}{312}\\\\=1.3429

#The z-score for 1230can be calculated as:

z(1230)=\frac{x-\mu}{\sigma}\\\\=\frac{1230-1491}{312}\\\\=\frac{-281}{312}\\\\=-0.9006

#The z-score for 2190 is calculated as follows:

z(2190)=\frac{x-\mu}{\sigma}\\\\=\frac{2190-1491}{312}\\\\=\frac{699}{312}\\\\=2.2404

#The z-score for 1380 is calculated as:

z(1380)=\frac{x-\mu}{\sigma}\\\\=\frac{1380-1491}{312}\\\\=\frac{-111}{312}\\\\=-0.3558

7 0
3 years ago
Which algebraic expression represents the phrase "the quotient of negative eight and the sum of a number and three"
iVinArrow [24]

Answer:

\dfrac{-8}{x+3}

Step-by-step explanation:

We need to find an algebraic expression for the given statement i.e. "the quotient of negative eight and the sum of a number and three".

Let the number be x. Quotient means to divide. It means we need to divide -8 and the sum of x and 3.

So, we can write it as follows :

\dfrac{-8}{x+3}

Hence, this is the required solution.

7 0
3 years ago
Write a simplified expression for the
Simora [160]

Answer: 3.75 + - 7

Step-by-step explanation:

1.5x - 3 + 1.5x - 3 + 0.75x - 1

1.5x + 1.5x + 0.75x - 3 + - 3 + - 1

3.75x + - 7

3 0
3 years ago
<img src="https://tex.z-dn.net/?f=4x%5E%7B2%7D%20%2B%2011x%20-%2020%20%3D%200" id="TexFormula1" title="4x^{2} + 11x - 20 = 0" al
STALIN [3.7K]
Answer using quadratic formulae=5/4 and -4

6 0
3 years ago
Find the value of..<br><br>​
Zina [86]

Step-by-step explanation:

[1/2]^-2= 4

[1/3]^-2=9

[1/4]^-2=16

So sum is 4+9+16=29

Hope this helps you.

6 0
3 years ago
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