3 years ago

What is the measure of ZRST?

Mathematics

1 answer:

satela [25.4K]3 years ago

7 0

Answer: 131

Step-by-step explanation: that one is good

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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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1 year ago

What is the solution of the inequality |2x+3|≤7?

Allushta [10]

Assuming you want to solve for x the result can vary. The result can be shown in multiple forms. Hope this helps!

Inequality Form:
−5≤x≤2
Interval Notation:
[−5,2]

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3 years ago

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Mars2501 [29]

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The length of a rectangular courtyard can be represented by (4x +3) and the width by (3x– 7). What is

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The area is 12x^2-19x-21

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3 years ago

Indra completed 80% of her test questions. If there were 120 questions, how many questions she complete

kramer

Answer:

96 questions

Step-by-step explanation:

Given that:

Total number of questions = 120

Percentage questions completed = 80%

Number of questions completed =?

Number of questions completed = total number of questions * percentage questions completed

Number of questions completed = 120 * 0.8

Number of questions completed = 96

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3 years ago