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Naddik [55]
3 years ago
10

Solve for c

Mathematics
1 answer:
Greeley [361]3 years ago
5 0
Solve for c
add like terms
get 2 = c - 12 then add 12 to both sides
+12 +12
so c = 14


solve for k
first distribute and add like terms
-k - 12 = -6 add 12 to both sides
get -k = 6 multiply both sides by -1
k = -6
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What is the solution to the equation -0.2(x - 20) = 44 - x? x = -90 x = 50 x = -50 x = 90
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Step-by-step explanation:

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Expand the terms on the left hand side to make it easier to rearrange

   -0.2(x-20) =44-x

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kondaur [170]

Answer:

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Step-by-step explanation:

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In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

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Norma got a score of 84.2; this version has a mean of 67.4 and a standard deviation of 14.

This means that X = 84.2 \mu = 67.4, \sigma = 14

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Z = \frac{X - \mu}{\sigma}

Z = \frac{84.2 - 67.4}{14}

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Pierce got a score of 276.8; this version has a mean of 264 and a standard deviation of 16.

This means that X = 276.8, \mu = 264, \sigma = 16

So

Z = \frac{X - \mu}{\sigma}

Z = \frac{276.8 - 264}{16}

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This means that X = 7.62, \mu = 7.3, \sigma = 0.8

So

Z = \frac{X - \mu}{\sigma}

Z = \frac{7.62 - 7.3}{0.8}

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