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Luden [163]
3 years ago
5

What’s the answer to this ?

Mathematics
1 answer:
Alexus [3.1K]3 years ago
5 0

Answer:

59.44 units²

Step-by-step explanation:

The area of each triangular section can be computed from the side length (5 units) and the central angle (72°) as ...

... section area = (1/2)sin(72°)·5² ≈ 12.5·0.951057 ≈ 11.8882 . . . units²

Then 5 such sections will have an area of ...

... pentagon area = 5·11.8882 units² = 59.4410 units²

_____

<em>Comment on central angle</em>

The central angles total 360°. There are 5 equal sections, so the central angle for each of them is 360°/5 = 72°.

<em>Comment on area formula</em>

It can be occasionally handy to know that the area of a triangle can be computed from the lengths of adjacent sides and the angle between them. The formula for sides of length "a" and "b" and angle β is ...

... A = (1/2)ab·sin(β)

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A random sample of 11 university students produced the following data, where x is the minutes spent studying per day, and y is t
SIZIF [17.4K]

Answer:

16.373,16.4

Step-by-step explanation:

Given that a  random sample of 11 university students produced the following data, where x is the minutes spent studying per day, and y is the first exam score (out of a maximum of 100 points).

x y

11 39

13 55

14 43

17 46

19 69

22 75

24 77

25 78

28 77

31 93

34 92 Observations 11        

       

ANOVA        

df SS MS F Significance F    

Regression 1 3214.095153 3214.095153 69.46052448 1.59367E-05    

Residual 9 416.4503017 46.27225574      

Total 10 3630.545455      

       

Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0%

Intercept 16.37281677 6.48384963 2.525169105 0.0324919 1.705329914 31.04030362 1.705329914 31.04030362

x 2.369323595 0.28428592 8.33429808 1.59367E-05 1.726224167 3.012423023 1.726224167 3.012423023

We get regression line as y =2.369x+16.373

a) value of intercept = 16.373

b) 16.4

8 0
3 years ago
Jerry is counting his shirts. he notices that for every 5 black t-shirts in his drawer he has two red t-shirts. if he owns 28 t-
lidiya [134]

Answer:

20

Step-by-step explanation:

5 0
3 years ago
Write the equation of the line in slope intercept form if its slope is 3 and y intercept is -5
Veseljchak [2.6K]

Answer:

y = 3x - 5

Step-by-step explanation:

1. The slope-intercept form a line is y = mx + b, where y = y-coordinate, m = slope, x = x-coordinate, and b = y-intercept.

2. Given the values of m and b, let's plug them in:

  • y = (3)x+(-5)
  • y = 3x-5

Therefore, the equation of the line in slope-intercept form is y = 3x - 5.

Have a lovely rest of your day/night.

7 0
3 years ago
Read 2 more answers
The axis in the coordinate plane which runs vertically is the what axis
Naddika [18.5K]
The vertical axis in a Cartesian coordinate system is the y-axis. The horizontal axis is the x-axis.
8 0
3 years ago
People were asked if they prefer Pepsi or Coke. The results are in the table below.
LuckyWell [14K]

Using it's concept, it is found that the probabilities are given as follows:

a) 0.1431 = 14.31%.

b) 0.7910 = 79.10%.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

Item a:

The number of people is:

23 + 44 + 28 + 39 = 134.

The number of people that prefer Pepsi is:

23 + 28 = 51.

Hence, for the two people, the probability is:

p = 51/134 x 50/133 = 0.1431 = 14.31%.

Item b:

There are 23 + 44 = 67 females, and 39 males who prefer Coke, hence the probability is:

p = (39 + 67)/134 = 0.7910 = 79.10%.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

3 0
1 year ago
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