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Whitepunk [10]
2 years ago
14

SOLVE FOR X AND THEN SOLVE FOR A

Mathematics
2 answers:
Licemer1 [7]2 years ago
4 0

Answer:

Step-by-step explanation:

A + B= 180°

(5x+20)+(9x-92)=180°

14x-72=180°

14x=252

x=18

A=5(18)+20

A=110

Nadusha1986 [10]2 years ago
4 0

Answer:

x = 18 , ∠ A = 110°

Step-by-step explanation:

∠ A and ∠ B are same- side interior angles and sum to 180° , that is

5x + 20 + 9x - 92 = 180

14x - 72 = 180 ( add 72 to both sides )

14x = 252 ( divide both sides by 14 )

x = 18

Then

∠ A = 5x + 20 = 5(18) + 20 = 90 + 20 = 110°

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Step-by-step explanation:

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Read 2 more answers
Last week, Sarah had exams in Math, Spanish, and English. On the Math exam, the mean was µ = 30 with s = 5, and Sarah had a scor
serious [3.7K]

Answer:

Sara expect the better grade for Math class.

Step-by-step explanation:  

Consider the provided information.

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Z=\frac{45-30}{5}

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On the Spanish exam, the mean was µ = 60 with s = 8 and Sarah had a score of X = 68.

Z score for Spanish: Z=\frac{x-\mu}{s}

Z=\frac{68-60}{8}

Z=\frac{8}{8}

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On the English exam, the mean was µ = 70 with s = 8 and Sarah had a score of X = 70.

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Z=\frac{70-70}{8}

Z=0

We can observe that Z score of Math is greater than Spanish and English.

Which means that Sarah did the best in her Math exam.

Hence, Sara expect the better grade for Math class.

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4 years ago
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Answer:

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