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allsm [11]
3 years ago
10

How do you do this question?

Mathematics
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

-$0.16

Step-by-step explanation:

The expected value is the sum of the outcomes multiplied by their probabilities.

E(X) = 1/38 (+68) + 37/38 (-2)

E(X) = -0.16

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Please help me!<br> I will give brainly
vichka [17]

Answer:

27

Step-by-step explanation:

You add 63 and 90 (90 being the right angle) and then subtract that from 180 which is the sum of all three angles and you get 27.

3 0
3 years ago
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What is 0.3 repeating as a fraction and in simplest form
Taya2010 [7]
3/10 you go by how many decimal points to move over... 0.1 one tenth.. 0.01 one hundeth an soo on.
3 0
3 years ago
Can anyone explain this question to me? My teacher solved it but I didn’t understand how she did it
Amiraneli [1.4K]

Step-by-step explanation:

To find the space a figure takes, we need to find the volume. Volume of a rectangular prism can be found by multiplying the length, width, and height of the figure.

We can start with the green block. The dimensions of this figure are 6cm, 3cm, and 3cm. The 5cm at the bottom is not a dimension of the green figure. Instead, it shows the total width of both blocks. We will use this later.

Back to the first block, we will find its volume by multiplying its dimensions together.

3 · 3 · 6 = 54

So, the volume of the first block is 54 cm³.

To this, we will add the volume of the blue block. We can find its dimensions with some simple deduction.

The picture shows that the height of the figure is 4cm less than the height of the green one, 6cm.

6 - 4 = 2

The height, then, is 2cm.

The width can be found by subtracting the width of the green block from the total width of both figures, 5cm.

5 - 3 = 2

So, the width is also 2cm.

We can see that the length of the blue block is equal to that of the green one, so we know that the length is 3cm.

Now, multiply all the dimensions we have found together.

2 · 2 · 3 = 12

The volume of the blue block is 12cm³.

We have found the volumes of both figures, so now we can add them both together to find the total.

54 + 12 = 66

So, the total volume is 66cm³.

I hope this was a satisfactory explanation ^^ Good luck, mate

7 0
3 years ago
Solving systems of equations using substitution y = 5x + 17. y= -2x -4
oksian1 [2.3K]

Answer:

(-3,2)

Step-by-step explanation:

Eliminate the equal sides of each equation and combine

5x + 17 = -2x - 4

Solve

x = -3

Evaluate  y  when  x  =  − 3 .

y = 2

(-3,2)

<em>hope this helps :)</em>

6 0
3 years ago
Use the graph of the polynomial function f(x) = -43 + 6x to complete the following:
mina [271]

9514 1404 393

Answer:

  1. positive
  2. negative
  3. decreasing
  4. increasing

Step-by-step explanation:

1. These are intervals where the graph is above the x-axis, hence positive.

2. These are intervals where the graph is below the x-axis, hence negative.

3. The first interval is between the left peak and the valley, where the graph is decreasing. The second interval is right of the right peak, where the graph is also decreasing.

4. The first interval is left of the left peak, where the graph is increasing. The second interval is between the valley and the right peak, where the graph is also increasing.

5 0
3 years ago
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