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Alchen [17]
2 years ago
6

What is the area???

Mathematics
1 answer:
Natalka [10]2 years ago
4 0

Answer:

in squared 252

Step-by-step explanation: idk how but

9 times 12= 108

6 times 15=90

6 times 9=54

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For online courses, like those in eCore, there is a positive correlation between the amount of time spent in the course and the
Troyanec [42]

Answer:

Regression Line is given by,

y = 22.909 + 0.209 x

The course grade of a student in the course who spent an average of 103 minutes in the course each week is: 22.909 + 0.209 × 103 = 44.436

Step-by-step explanation:

The equation of Regression equation is of the form of:

y = a + bx

where, a is intercept and b is slope

The formula for a and b is given by,

a=\frac{\sum Y \sum X^2-\sum X \sum XY}{n\sum X^2-(\sum X)^2}\\ and, b = \frac{n\sum XY -\sum X \sum Y}{n\sum X^2-(\sum X)^2}

Here, ∑X = 1149.8, ∑Y = 377.2, ∑XY = 93115.95, ∑X² = 320246.72

Thus, a = 22.909

and b = 0.209

Thus, Regression Line is given by,

y = 22.909 + 0.209 x

Thus, The course grade of a student in the course who spent an average of 103 minutes in the course each week is: 22.909 + 0.209 × 103 = 44.436

Now plotting these line:

6 0
3 years ago
The depth of Nathan's binder is 2 5/12 inches. what is the measurement as a decimal?
masya89 [10]
Convert to improper fraction: 2 5/12 = 29/12
Divide 29 by 12: 29/12 = 2.42
 
2.42 inches
6 0
3 years ago
How would you go on dividing 7/893​
love history [14]

Answer:

0.00783874

Step-by-step explanation:

7/893= 0.00783874

I just put it in the calculator  

3 0
3 years ago
Factorise fully X^2 subtract 2x
anastassius [24]

Answer:

x(x-2)

Step-by-step explanation:

X^2-2x

x(x-2)

7 0
3 years ago
A salesman who uses his car extensively finds that his gasoline bills average $125.32 per month with a standard deviation of $49
tiny-mole [99]

Answer:

The probability that his bill will be less than $50 a month or more than $150 for a single month is 0.3728 = 37.28%.

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.

A salesman who uses his car extensively finds that his gasoline bills average $125.32 per month with a standard deviation of $49.51.

This means that \mu = 125.32, \sigma = 49.51

Less than 50:

p-value of Z when X = 50. So

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

Z = \frac{50 - 125.32}{49.51}

Z = -1.52

Z = -1.52 has a p-value of 0.0643

More than 150

1 subtracted by the p-value of Z when X = 150. So

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

Z = \frac{150 - 125.32}{49.51}

Z = 0.5

Z = 0.5 has a p-value of 0.6915

1 - 0.6915 = 0.3085

The probability that his bill will be less than $50 a month or more than $150 for a single month is:

0.0643 + 0.3085 = 0.3728

The probability that his bill will be less than $50 a month or more than $150 for a single month is 0.3728 = 37.28%.

3 0
3 years ago
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