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creativ13 [48]
4 years ago
14

2x + 3y = 405x + 2y = 30​

Mathematics
2 answers:
vlabodo [156]4 years ago
8 0
I think I found it
X=10/11
Y=140/11
Andrew [12]4 years ago
7 0

●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●

          Hi my lil bunny!

❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙

A) Let's solve for x.  2x + 3y = 40

Step 1: Add -3y to both sides.

2x + 3y + -3y = 40 + -3y

2x = -3y + 40

Step 2: Divide both sides by 2.

\frac{2x}{2} = \frac{-3y + 40}{2}

x = \frac{-3}{2} y + 20

Answer : \frac{-3}{2} y + 20

~~~~~~~~~~~~~~~~~

B) Let's solve for x. 5x + 2y = 30

Step 1: Add -2y to both sides.

5x + 2y + -2y = 30 + -2y

5x = -2y + 30

Step 2: Divide both sides by 5.

\frac{5x}{5} = \frac{-2y + 30}{5}

x = \frac{-2}{5} y + 6

Answer : \frac{-2}{5} y + 6

❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙

●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●

Hope this helped you.

Could you maybe give brainliest..?

❀*May*❀

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Step-by-step explanation:

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In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

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Whichever student's GPA had the higher z-score had the best GPA compared to other students.

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This means that X = 2.5, \mu = 3.2, \sigma = 0.8

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

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Z = -0.875

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This means that X = 88, \mu = 75, \sigma = 20

The z-score is:

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

Z = \frac{88 - 75}{20}

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Kamala 8.9 8 0.4

This means that X = 8.9, \mu = 8, \sigma = 0.4

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Z = 2.25

Due to the higher Z-score, Kamala had the best GPA when compared to other students at her school.

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