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3 years ago

The range is the set of A. first coordinates B. ordered pairs C. second coordinates

Mathematics

2 answers:

Zigmanuir [339]3 years ago

8 0

I think the answer is B. Ordered Pairs
:)

Ira Lisetskai [31]3 years ago

7 0

The range is the set of A. Ordered Pairs

Feel free to ask me more questions on my profile. I am more than happy to help. Don't forget Brainliest! :)

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Sally has 50 pencils. 38% of them have stripes. How many have stripes?

Brums [2.3K]

Answer: 19

Step-by-step explanation:

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3 years ago

Which of the following represents the distance

Lunna [17]

Answer:

D. d = sqrt( ( x2-x1)^2 + (y2-y1)^2)

C. d = sqrt( ( x1-x2)^2 + (y1-y2)^2)

B. d = sqrt( (|x2-x1|^2 + |y2-y1|^2)

Step-by-step explanation:

Given two points (x1, y1) and (x2,y2) we can find the distance using

d = sqrt( ( x2-x1)^2 + (y2-y1)^2)

The order of the terms inside the square doesn't matter

d = sqrt( ( x1-x2)^2 + (y1-y2)^2)

When we are squaring are term, we can take the absolute value before we square and it does not change the value

d = sqrt( (|x2-x1|^2 + |y2-y1|^2)

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3 years ago

Among freshman at a certain university, scores on the Math SAT followed the normal curve, with an average of 550 and an SD of 10

lina2011 [118]

Answer:

a) 6.68th percentile

b) 617.5 points

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 problem, we have that:

$\mu = 550, \sigma = 100$

a) A student who scored 400 on the Math SAT was at the ______ th percentile of the score distribution.

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

$Z = \frac{400 - 550}{100}$

$Z = -1.5$

$Z = -1.5$ has a pvalue of 0.0668

So this student is in the 6.68th percentile.

b) To be at the 75th percentile of the distribution, a student needed a score of about ______ points on the Math SAT.

He needs a score of X when Z has a pvalue of 0.75. So X when Z = 0.675.

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

$0.675 = \frac{X - 550}{100}$

$X - 550 = 0.675*100$

$X = 617.5$

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3 years ago

Find the surface area of the regular pyramid<br> PLEASE HELP ASAP

Whitepunk [10]

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2 years ago

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Sonbull [250]

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Prob (3rd defective) = 2/18 = 1/9

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Prob ( all 4 defective) = 1/5 * 3/19 * 1/9 * 1/17 = 1 / 4845 answer

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3 years ago