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joja [24]
3 years ago
13

D B 3x43 IC 4x+2 Determine the value of mZDCB.

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0

Step-by-step explanation:

3x+3² , you might want a second opinion I am no good at math but I tried to work it out to see if I would get it right so don't quote me on this and put it down for an answer get a second opinion please

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5. Based on recent results, scores on the SAT test are normally distributed with a mean of 1511 and a standard deviation of 312.
Mekhanik [1.2K]

Answer:

The actual SAT score is 2024.

The equivalent ACT score is 29.49.

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.

SAT score that is in the 95th percentile

Scores on the SAT test are normally distributed with a mean of 1511 and a standard deviation of 312, which means that \mu = 1511, \sigma = 312

95th percentile is X when Z has a pvalue of 0.95, so X when Z = 1.645. The score is:

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

1.645 = \frac{X - 1511}{312}

X - 1511 = 1.645*312

X = 2024

The actual SAT score is 2024.

Equivalent ACT score:

The equivalent ACT score is the 95th percentile of ACT scores.

Scores on the ACT test are normally distributed with a mean of 21.1 and a standard deviation of 5.1, which means that \mu = 21.1, \sigma = 5.1. So

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

1.645 = \frac{X - 21.1}{5.1}

X - 21.1 = 1.645*5.1

X = 29.49

The equivalent ACT score is 29.49.

5 0
2 years ago
A cheetah run 70 miles per hour what is the speed for feet per hour
pochemuha

Answer:

The correct answer to this question is that the cheetah can run 369,000 feet per hour. We can work this out in the following way:

One mile equals 1760 yards

In feet that is 3 x 1760 or 5,280

So Feet per hour will be 5280 x 70 or

369,600 feet per hour.

Read more on Brainly.com - brainly.com/question/134707#readmore

Step-by-step explanation:

5 0
3 years ago
Three fourths plus 2
aleksley [76]

Answer:

<u>2.75</u>

Step-by-step explanation:

3/4 (three fourths) plus 2 =<u> 2.75!</u>

<u></u>

3 0
3 years ago
Rewrite the following fraction to division <br> 7/11<br> 5/2<br> 9/10<br> 7/15
myrzilka [38]
Answer:
7 divided by 11
5 divided by 2
9 divided by 10
7 divided by 15

Explanation:
The slash is exactly like a division sign, it’s just shown different and like a fraction
4 0
3 years ago
What is the product?
beks73 [17]

Answer:

The asnwer for multiplication problems.

Step-by-step explanation:

5 0
2 years ago
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