The ordered pair (x,y)=(2,-3) is a solution to which of the following systems of equation

Answers

Answer 1

Answer:

Y=2x-7

Step-by-step explanation:

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Please hurry need help

Answers

Answer:

-11

Step-by-step explanation:

Solve equation 3(c - 2)=15What are two ways to start solving this equation? Choose BOTH ways

Answers

Answer:

use the distributive property to get 3c -6 =15 and divide both side by 3 to get c - 2=5

Step-by-step explanation:

you can solve this equation using both these ways and if you do the process of elimination those two answers are the most accurate

Let’s solve your equation from my knowledge theirs only one way to solve this.

So far this month Raul calculated that he will earn $30 in commission for his $200 in product sales. If Raul would like for his commission to be $132, how much MORE does he need in sales? a. $102

b. $880

c. $588

D. 680

Answers

Answer:

D. 680

Step-by-step explanation:

Suppose that the sitting back-to-knee length for a group of adults has a normal distribution with a mean of μ=22.5 in. and a standard deviation of σ=1.1 in. These data are often used in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats. Instead of using 0.05 for identifying significant values, use the criteria that a value x is significantly high if P(x or greater) ≤0.01 and a value is significantly low if P(x or less) ≤0.01.Find the back-to-knee lengths separating significant values from those that are not significant.

Answers

Answer:

Measures equal or lower than 19.94 inches are significantly low.

Measures equal or higher than 25.06 inches are significantly high.

Step-by-step explanation:

Problems of normally distributed samples can be 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:

$Z = (X - \mu)/(\sigma)$

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:

$\mu = 22.5, \sigma = 1.1$

Find the back-to-knee lengths separating significant values from those that are not significant.

Significantly low

In this exercise, a value is going to be to significantly low if it has a pvalue of 0.01 or less. So we have to find X when Z has a pvalue of 0.01. This is between $Z = -2.32$ and $Z = -2.33$ , so we use $Z = -2.325$

$Z = (X - \mu)/(\sigma)$

$-2.325 = (X - 22.5)/(1.1)$

$X - 22.5 = -2.325*1.1$

$X = 19.94$

Measures equal or lower than 19.94 inches are significantly low.

Significantly high

In this exercise, a value is going to be to significantly high if it has a pvalue of 0.99 or more. So we have to find X when Z has a pvalue of 0.99. This is $Z = 2.325$ . So:

$Z = (X - \mu)/(\sigma)$

$2.325 = (X - 22.5)/(1.1)$

$X - 22.5 = 2.325*1.1$

$X = 25.06$

Measures equal or higher than 25.06 inches are significantly high.

Final answer:

To find the separating back-to-knee lengths, we calculate the corresponding z-scores for the given probabilities. Using the standard normal distribution table, we find that the separating values are 24.78 inches for significantly high lengths and 20.22 inches for significantly low lengths.

Explanation:

To find the back-to-knee lengths separating significant values from those that are not significant, we need to calculate the z-scores corresponding to the given probabilities. For a value to be significantly high, we look for a z-score such that the area to its right is 0.01. Using the standard normal distribution table, we find that z = 2.33. Similarly, for a value to be significantly low, we look for a z-score such that the area to its left is 0.01. Again using the table, we find that z = -2.33. Converting these z-scores back to actual back-to-knee lengths, we can calculate the separating values as: 22.5 + (2.33 * 1.1) = 24.78 inches for significantly high lengths, and 22.5 - (2.33 * 1.1) = 20.22 inches for significantly low lengths.

Learn more about Back-to-knee lengths here:

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Select all of the numbers that Brooke could multiply by 2386 to get a product greater than 2386

Answers

Answer:

Step-by-step explanation:

Any number greater than 1 will give a number greater than 2386

Make sure you complete the work for EACH triangle and answer whether or not it is a right triangle. * If you do this correctly I'll give you 50 points.

Answers

I believe that triangle B and E are right triangles.

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