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2 years ago

Decide whether this statement is "always, sometimes, or never"

Mathematics

1 answer:

Lostsunrise [7]2 years ago

6 0

The answer is sometimes, only if the trapezoid is an isoceles trapezoid.

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Kris has two choices for a part-time job after school. Kris could make $10 per hour entering data for a local company, but none

amm1812

I'll do a similar problem, and I challenge you to do this using similar techniques!

If John works for 15$ a hour with his friends rather than working for 20$ an hour for 50 hours a month, what's the monthly opportunity cost?

John would make 20*50=1000 dollars a month at the second option as he makes 20$ an hour 50 times. Next, if he works with his friends, he makes 15*50=750 dollars as he works 50 hours for 15 dollars an hour, or adds 15 50 times.

His opportunity cost would be <highest money>-<lowest money>=1000-750=250 dollars a month. Good luck on this question, and feel free to ask further questions!

3 0

3 years ago

Read 2 more answers

Factor the following expression.<br> x4 – 3x2 - 4

Liono4ka [1.6K]

(x2 +1) (x2-4) (mark as brainiest)

7 0

2 years ago

An aptitude test has a mean score of 80 and a standard deviation of 5. The population of scores is normally distributed. What pr

konstantin123 [22]

Answer:

2.28% of tests has scores over 90.

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:

$\mu = 80, \sigma = 5$

What proportion of tests has scores over 90?

This proportion is 1 subtracted by the pvalue of Z when X = 90. So

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

$Z = \frac{90 - 80}{5}$

$Z = 2$

$Z = 2$ has a pvalue of 0.9772.

So 1-0.9772 = 0.0228 = 2.28% of tests has scores over 90.

8 0

2 years ago

Which of the following expressions could be used to estimate the difference between -12.34 and -4.8? -12 - 5 -12 + 5 -12 - 4 -12

Sphinxa [80]

This is your answer

<span>-12 - 5 (first one)

hope that helps

</span>

5 0

2 years ago

Read 2 more answers

A toy company produces 1,000 toys per month. In January, 75 toys did not meet quality standards. The toy company generates a ran

erik [133]

Based on this sample, 100 toys will not meet standards.

There is 1 value that is 75 or lower in this simulation. This makes the experimental probability 1/10. 1/10(1000) = 100 toys for the month.

3 0

3 years ago