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Katen [24]
3 years ago
10

There is a regular dodecahedron with all the points connected to each other. What is the area if each of the shales formed if th

e distance between each Point is x?
Mathematics
1 answer:
tamaranim1 [39]3 years ago
3 0

Answer:

18581.16

Step-by-step explanation:

The area of each of the shale can be calculated as

distance between each point = x

The area of the regular Dodecahedron

A = \sqrt[3]{25+10\sqrt{5} }   a^{2}

where a = number of edges = 30

hence the area of the regular dodecaheron = 18581.16

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What is the area<br> of circle <br><br><br><br>with a diameterms of 10 m​
pentagon [3]

Answer:

exact area = 25(pi) m^2

approximate area = 78.54 m^2

Step-by-step explanation:

diameter = 10 m

radius = diameter/2 = 10 m / 2 = 5 m

area = (pi)r^2

area = (pi)(5 m)^2

area = 25(pi) m^2

area = 78.54 m^2

6 0
3 years ago
Help please! Could you explain it too?
Anettt [7]

Answer:

a) not proportional

b) proportional; k = -\frac{3}{5}

Step-by-step explanation:

a) for any proportional equation, the line must pass through the origin. The equation in a) is y = 4x + 1, and the '+1' is the y-intercept. This means that the line does not pass through the origin, so x and y cannot increase by the same amount (i.e. they are not proportional).

Another way to determine this is is to use the y = kx base. If you have an equation that fits that it's likely proportional.

Here, if the equation was only y = 4x then it'd be proportional because u can see that k = 4. This is not the equation though, and the 4x + 1 doesn't fit to the y = kx formula so it can't be proportional.

b) straight away you can see that there's no 'c' term (y = mx + c) which means the y-intercept is 0, so the line passes through the origin. While this does not immediately mean the line is proportional, you can make sure that it is by checking it fits with the y = kx equation.

y = -(3/5)x fits with y = kx, with k being -3/5

3 0
2 years ago
Shalini blusex batting scores were 13144 155 142 167 172 what was his score​
balu736 [363]
13144 mr brill this should help
4 0
2 years ago
Unit rate for 3 inches of rain in 6 hours
Travka [436]
3 (inches) / 6 (hrs) = 1/2 (or 0.5) inches per hr <==
6 0
3 years ago
Read 2 more answers
The 7th grade has 159 students. There are twice as many boys in the grade as there are girls.
aleksklad [387]

Answer:

106 boys

Step-by-step explanation:

7th grade = 159 students

Boys to girls ratio:

2:1

Find two thirds of 159:

2/3*159 = 106 boys

159-106= 53 girls

Check:

53*2 = 106

3 0
3 years ago
Read 2 more answers
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