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Olin [163]
3 years ago
12

What is -2n - 24 = -8(2n-4) , and how do I do it? Thanks in advance.

Mathematics
2 answers:
myrzilka [38]3 years ago
7 0
-2n-24=-8(2n-4)
Multiply both sides by -1
2n+24=8(2n-4)
Distribute the right side
2n+24=16n-32
Subtract 2n from both sides
24=14n-32
Add 32 to both sides
56=14n
Divide 14 from both sides
n=4
expeople1 [14]3 years ago
7 0
-2n-24=-8 (2n-4)
Simplify
Multiply 2n and -4 by -8
-2n-24=-16n+32
A negative ×negative =positive this is why 32 becomes positive
A negative × a positive= negative this is why 16 becomes negative
Now add both sides by 24
-2n= -16n+56
Now add 16n to both sides
14n= 56
Divide both sides by 14
N= 4
Hope that helps let me know if you need more help understanding:)
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8 0
3 years ago
A manufacturing firm tests job applicants. Test scores are normally distributed with a mean of 500 and a standard deviation of 5
Blababa [14]

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The probability that the candidate score is 600 or greater

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<u><em>Step(i)</em></u>:-

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Given standard deviation of the Population = 50

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Given  X = 600

Z = \frac{x-mean}{S.D} = \frac{600-500}{50} = \frac{100}{50} =2

<u><em>Step(ii)</em></u>:-

The probability that the candidate score is 600 or greater

P(X≥ 600 ) = P(z≥2)

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<u><em>Final answer</em></u>:-

The probability that the candidate score is 600 or greater

P(X≥ 600 ) = 0.0228

5 0
2 years ago
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