Ask question

Ask question

All categories

ArbitrLikvidat [17]

2 years ago

11

A dodecahedron is a Platonic solid with a surface that consists of 12 pentagons, each of equal area. By how much does the surfac

e area of a dodecahedron increase as the side length of each pentagon doubles from 1 unit to 2 units?

1 answer:

Nastasia [14]2 years ago

4 0

Answer:

12 times 2 since it doubles every time I'm not that sure so if I am not correct my bads

You might be interested in

An item costs $20 and sells for $50.

Helga [31]

Step-by-step explanation:

50-20=30 rate of markup

8 0

3 years ago

How is this equation completed? I cannot find any examples in the book.

djverab [1.8K]

Answer: Option D

$t_{max} =19\ s$

Step-by-step explanation:

Note that the projectile height as a function of time is given by the quadratic equation

$h = -12t ^ 2 + 456t$

To find the maximum height of the projectile we must find the maximum value of the quadratic function.

By definition the maximum value of a quadratic equation of the form

$at ^ 2 + bt + c$ is located on the vertex of the parabola:

$t_{max}= -\frac{b}{2a}$

Where $a$

In this case the equation is: $h = -12t ^ 2 + 456t$

Then

$a=-12\\b=456\\c=0$

So:

$t_{max} = -\frac{456}{2*(-12)}$

$t_{max} =19\ s$

7 0

3 years ago

Show all your work to receive full credit for this problem. Solve the system of equations using the elimination method. 2a + 3b

Sindrei [870]

Given equations are;<span>
2a + 3b = -1 ..................equation 1
3a + 5b = -2 ....................equation 2</span>

Now multiply equation 1 with (-3)

The equation will be;

-6a -9b = 3 …………………..equation 3

Now multiply equation 2 with (2)

The equation will be;

6a + 10b = -4 ……………..equation 4

Now add equation 3 and equation 4

-6a – 9b = 3

<span>6a + 10b = -4</span>

<span>------------------------------</span>

0a + b = -1

b = -1

Now put the value of b in equation 1

2a + 3(-1) = -1

2a -3 = -1

2a = -1+3

2a = 2

a=1

Thus the solution is (a,b) = (1,-1)

<span>
</span>

8 0

3 years ago

Help me please ASAP!!!!

nydimaria [60]

Answer:

i need this too

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Which of the following have a rate of change of 3?<br>

denpristay [2]

31 is the rats or change

6 0

3 years ago