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notsponge [240]
2 years ago
5

Need a quick answer please

Mathematics
1 answer:
Orlov [11]2 years ago
6 0

Answer:

157 degrees

Step-by-step explanation:

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Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviatio
Bond [772]

Answer:

The percentage of students who scored below 620 is 93.32%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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, we have that:

\mu = 500, \sigma = 80

Percentage of students who scored below 620:

This is the pvalue of Z when X = 620. So

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

Z = \frac{620 - 500}{80}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

The percentage of students who scored below 620 is 93.32%.

3 0
3 years ago
Read 2 more answers
Which system of linear equations represents another pair of parallel lines?
vesna_86 [32]

Answer:

The answer is C. 3x+y=7, 6x+2y=10

Step-by-step explanation:

7 0
2 years ago
I need help ASAP!!!
Ulleksa [173]

The are of the purple figure is 18 square units.

Step-by-step explanation:

Just count the number of squares of the purple units. Flr the incomplete squares, find the corresponding incomplete square and count them as 1.

3 0
2 years ago
How does the graph of y=4x+7 differ from the graph of y=4x
Schach [20]

Find any two points on the line.

<span>x=0⇒y=4<span>(0)</span>+7=7⇒</span> Point 1: <span>(0,7)</span>

<span>x=−1⇒y=4<span>(−1)</span>+7=3⇒</span> Point 2: <span>(−1,3)</span>

Step 2: Plot the two points from Step 1

Step 3: Draw a straight line through both points

3 0
3 years ago
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(5x3 + 3x2 - 5x + 4)
yKpoI14uk [10]

Hello there i hope you are having a great day :) Your question : (5x3 + 3x2 - 5x + 4) Answer : 5x^3 + 3x^2 - 5x +4

Hopefully that helps ya ❤

8 0
3 years ago
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