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Hitman42 [59]
3 years ago
11

Math problems help me with them giving 40 points and brainly!

Mathematics
2 answers:
Goshia [24]3 years ago
5 0

Answer:

it's 44.25%

Step-by-step explanation:

Plz mark as brainliest and follow me plz

marissa [1.9K]3 years ago
3 0

Answer:

Step-by-step explanation:

its additive identity

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What is the distance between -20 and -6 on a number line
podryga [215]

Answer:

14 units

Step-by-step explanation:

The distance is -6 - (-20)

                           -6+20

                                 14

4 0
3 years ago
Read 2 more answers
A grading scale is set up for 1000 students' test scores. It assumes the
astra-53 [7]

Answer:

464 students will score between 48 and 75. Using the z-distribution, we measure how many standard deviations each score is from the mean, then find the p-value associated with each score to find the proportion, and from the proportion, we find how many out of 1000.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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.

It assumes the scores are normally distributed with a mean score of 75 and a standard deviation of 15.

This means that \mu = 75, \sigma = 15

How many students will score between 48 and 75?

First we find the proportion, which is the pvalue of Z when X = 75 subtracted by the pvalue of Z when X = 48. So

X = 75

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

Z = \frac{75 - 75}{15}

Z = 0

Z = 0 has a p-value of 0.5

X = 48

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

Z = \frac{48 - 75}{15}

Z = -1.8

Z = -1.8 has a p-value of 0.0359

1 - 0.0359 = 0.4641

Out of 1000:

0.4641*1000 = 464

464 students will score between 48 and 75. Using the z-distribution, we measure how many standard deviations each score is from the mean, then find the p-value associated with each score to find the proportion, and from the proportion, we find how many out of 1000.

7 0
3 years ago
Plz help me NOW and I will mark you brainliest
Readme [11.4K]

Answer:

Translate from words to mathematical equation.

"n is m% of what?"

m% = m/100

what = a variable ... "x". for example.

"is" means "="

"of" means multiply

n = (m/100)•x

5 0
2 years ago
Dave kicked a ball 42 feet. The
LenaWriter [7]
42 divided by 6 pls give me brainlyliest
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3 years ago
How can you write and solve an addition or subtraction equation?
Fiesta28 [93]

Answer:

What equation...................wait nvm

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