3 years ago

Free Brainliest to the first answer!

Mathematics

2 answers:

Marrrta [24]3 years ago

5 0

Answer:

Step-by-step explanation:

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vladimir2022 [97]3 years ago

4 0

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On a standardized exam, the scores are normally distributed with a mean of 165 and astandard deviation of 40. Find the z-score o

vladimir1956 [14]

The Z-score is calculated by the formula below

$\begin{gathered} z-score=\frac{(x-\mu)}{\sigma}_{} \\ \mu=\operatorname{mean} \\ \sigma=s\tan dard\text{ deviation} \\ x=\text{score} \end{gathered}$

Step 2: Substitute the given parameters in the formula

$\begin{gathered} z-\text{score}=\frac{145-165}{40} \\ Z=-\frac{20}{40} \\ Z=-\frac{1}{2} \\ Z=-0.5 \end{gathered}$

Hence, the z-score of a person who scored 145 on the exam is -0.5

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What is the value of x? two angles 8x-8, 7x+8

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15x due to -8+8 being 0

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Westkost [7]

Answer:

Exact Form:

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Decimal Form:

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Mixed Number Form:

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3 years ago

Which of the following is equivalent to the expression:

Alecsey [184]

Selection A is correct

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3 years ago

Simon drove through some roadworks where the speed limit was 50 mph. Two cameras recorded the time taken to travel 1200 m throug

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Answer:

$Speed = 21.43m/s$

Step-by-step explanation:

Given

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Required

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In this case:

$Speed = \frac{Distance\ of\ Roadword}{Time\ Captured}$

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