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Ivan
3 years ago
9

I don't get this can somebody help me

Mathematics
2 answers:
Yuliya22 [10]3 years ago
8 0
This is really easy if you think and look at the picture.

There were 15 dvds. 1/5 were documentaries.

All you have to do is figure out what 1/5 of 15 is. Yes?

So to find out what 1/5 of 15 is, you divide 15 by 5, and that's your answer.

The answer is 3.
satela [25.4K]3 years ago
8 0
The answer is three, to check: count to five, and point at each dot. Every time you say 5, put a little pencil dot on the blue circle. When you found the pencil dots, you could end up with three.
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Suppose you pay a dollar to roll two dice. if you roll 5 or a 6 you Get your dollar back +2 more just like it the goal will be t
LiRa [457]

Answer:

(a)$67

(b)You are expected to win 56 Times

(c)You are expected to lose 44 Times

Step-by-step explanation:

The sample space for the event of rolling two dice is presented below

(1,1), (2,1), (3,1), (4,1), (5,1), (6,1)\\(1,2), (2,2), (3,2), (4,2), (5,2), (6,2)\\(1,3), (2,3), (3,3), (4,3), (5,3), (6,3)\\(1,4), (2,4), (3,4), (4,4), (5,4), (6,4)\\(1,5), (2,5), (3,5), (4,5), (5,5), (6,5)\\(1,6), (2,6), (3,6), (4,6), (5,6), (6,6)

Total number of outcomes =36

The event of rolling a 5 or a 6 are:

(5,1), (6,1)\\ (5,2), (6,2)\\( (5,3), (6,3)\\ (5,4), (6,4)\\(1,5), (2,5), (3,5), (4,5), (5,5), (6,5)\\(1,6), (2,6), (3,6), (4,6), (5,6), (6,6)

Number of outcomes =20

Therefore:

P(rolling a 5 or a 6)  =\dfrac{20}{36}

The probability distribution of this event is given as follows.

\left|\begin{array}{c|c|c}$Amount Won(x)&-\$1&\$2\\&\\P(x)&\dfrac{16}{36}&\dfrac{20}{36}\end{array}\right|

First, we determine the expected Value of this event.

Expected Value

=(-\$1\times \frac{16}{36})+ (\$2\times \frac{20}{36})\\=\$0.67

Therefore, if the game is played 100 times,

Expected Profit =$0.67 X 100 =$67

If you play the game 100 times, you can expect to win $67.

(b)

Probability of Winning  =\dfrac{20}{36}

If the game is played 100 times

Number of times expected to win

=\dfrac{20}{36} \times 100\\=56$ times

Therefore, number of times expected to loose

= 100-56

=44 times

8 0
4 years ago
5,678.321 what is the place value of the 2
Katen [24]

Answer:

20

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the measure of angle 42<br> O 30°<br> O 420<br> O 120°<br> O 1389
Lelechka [254]

Answer:

42°

Step-by-step explanation:

angle 3 + angle 4 = 180° because together they make a straight line. So your equation should be 23x + 7x = 180. Add the like terms and you get 30x=180. Divide by 30 on both sides to get x. now you know that x=6. angle 4 = 7x. so you would multiply 7*6 to get 42. Thus angle 4= 42°

3 0
3 years ago
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Can y’all help me solve this?
Thepotemich [5.8K]
Do you have to give me the whole graph lol
4 0
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When f ( x ) = 9 x 2 + x − 5 , evaluate f ( − 4
Sloan [31]

Answer:

is that supposed to be a squared x?

9(-4)^2 + (-4) - 5 = 135

9(-4) × 2 + (-4) - 5 = -81

id.k which one is right sorry

4 0
3 years ago
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