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Archy [21]
3 years ago
14

When two lines intersect, they form blank linear pairs and blank pairs of vertical angles

Mathematics
1 answer:
serious [3.7K]3 years ago
8 0
What is your question?
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What is x if y Is 5 <br> x^2 (2y +5)=240
UkoKoshka [18]
X^2(2y+5)=240
x^2(2(5)+5)=240
x^2+(10+5)=240
x^2+15=240
minus 15 both sides
x^2=225
sqrt both sides
x=15
6 0
3 years ago
What is the Mean, Median, Mode, and Range for number 3<br><br> Please help
inysia [295]

Answer:

Mean: 49

Median: 41

Mode: 45

Range: 70

Step-by-step explanation:

To find the mean: add up all the numbers, then divide by how many numbers there are.

To find the median:

Arrange your numbers in numerical order.

Count how many numbers you have.

If you have an odd number, divide by 2 and round up to get the position of the median number.

If you have an even number, divide by 2. Go to the number in that position and average it with the number in the next higher position to get the median.

To find the mode: The mode of a data set is the number that occurs most frequently in the set.

To find the range: The range is the difference between the smallest and highest numbers in a list or set. To find the range, first put all the numbers in order. Then subtract (take away) the lowest number from the highest.

8 0
2 years ago
Read 2 more answers
HELP ME PLEASE AND EXPLAIN
Svetradugi [14.3K]
What is your question?
5 0
3 years ago
Put these decimals from least to greatest<br> 8.37 8.3 8.219 8.129
patriot [66]
8.129
8.219
8.3
8.37

Always go from left to right as compare the values in the tenth, then hundredths, then thousandths place. Remember that if there is no digit, it is a 0 (after the decimal of course).
7 0
3 years ago
Read 2 more answers
18. A normal population has a mean of 80.0 and a standard deviation of 14.0. a. Compute the probability of a value between 75.0
mixer [17]

Answer:

a) 40.17% probability of a value between 75.0 and 90.0.

b) 35.94% probability of a value 75.0 or less.

c) 20.22% probability of a value between 55.0 and 70.0.

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 = 14

a. Compute the probability of a value between 75.0 and 90.0.

This is the pvalue of Z when X = 90 subtracted by the pvalue of Z when X = 75.

X = 90

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

Z = \frac{90 - 80}{14}

Z = 0.71

Z = 0.71 has a pvalue of 0.7611

X = 75

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

Z = \frac{75 - 80}{14}

Z = -0.36

Z = -0.36 has a pvalue of 0.3594

0.7611 - 0.3594 = 0.4017

40.17% probability of a value between 75.0 and 90.0.

b. Compute the probability of a value 75.0 or less.

This is the pvalue of Z when X = 75. So

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

Z = \frac{75 - 80}{14}

Z = -0.36

Z = -0.36 has a pvalue of 0.3594

35.94% probability of a value 75.0 or less.

c. Compute the probability of a value between 55.0 and 70.0.

This is the pvalue of Z when X = 70 subtracted by the pvalue of Z when X = 55.

X = 70

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

Z = \frac{70 - 80}{14}

Z = -0.71

Z = -0.71 has a pvalue of 0.2389

X = 55

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

Z = \frac{55 - 80}{14}

Z = -1.79

Z = -1.791 has a pvalue of 0.0367

0.2389 - 0.0367 = 0.2022

20.22% probability of a value between 55.0 and 70.0.

6 0
3 years ago
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