What is the value of x? What is the measure of Angle WXZ?

Mathematics

2 answers:

Anna [14]3 years ago

6 0

Answer: Well if I was taking out the other stuff in there It would be an right angle but since the other line is there its acute

Step-by-step explanation:

bija089 [108]3 years ago

3 0

Please find attached photograph for your answer

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One option in a roulette game is to bet $12 on red. (There are 18 red compartments, 18 black compartments, and two compartmen

Alona [7]

Answer:

The expected value is -$0,63

Step-by-step explanation:

The expected value of a discrete variable x is given by:

E(x)=x1*p(x1)+x2*p(x2)+...+xn*p(xn)

Where x1, x2, .. xn are the posibles results that the variable x can take and p(x1), p(x2),...,P(xn) are their respective probabilities.

In this case, we have two possible results if we bet $12 on red. This results are:

1. The balls lands on red: in this case we keep the $12 we paid and we awarded 12. That means, we gain $12 and the probability of this case is the division of the number of red compartments by total number of compartments. So:

x1=$12

p(x1)=18/38

2. The balls doesn't land on red: in this case we lose the $12 that we bet and the probability is the division of number of compartments that aren't red by the total number of compartments. So:

x2=-$12

p(x2)=20/38

Then, replacing x1, x2, p(x1) and p(x2) on the equation of the expected value, we get:

E(x)=($12)*(18/38) + (-$12)*(20/38)

E(x)=$-0.63

So, the expected value if we bet $12 on red is to lose $0.63

5 0

4 years ago

Students in 7th and 8th grade were asked the types of movies they prefer. The results of the survey are shown in the two-way tab

Andreyy89

A table is a arrangement of the data or the information. For the given table statement second, third and fifth are the correct statements.

Given information-

A four by four table in given for the survey of the 7th and 8th group students for the movie preference.

The first column has no label with entries drama, action, comedy, total.

The second column is labeled 7th with entries 11%, 25%, 14%, 50%.

The third column is labeled 8th with entries 15%, 19%, 16%, 50%.

The fourth column is labeled total with entries 26%, 44%, 30%, 100%.

<h3>Table </h3>

A table is a arrangement of the data or the information

Now look at the statement.

1) More 7th graders were surveyed than 8th graders- As both 7th grade and the 8th grade student surveyed are 50 percent. Thus the statement 1 is incorrect.

2) The marginal relative frequency for action movies is 44%-Total 7th grade students like the action movies are 25 percent. Total 8th grade students like the action movies are 19 percent. The sum of both is 44 percent. Thus this is correct statement.
3) The joint relative frequency for 8th graders who like comedy movies is 16%- From the table it can be said that the frequency of the 8th grade students likes the comedy movie is 16 percent. Thus this is a correct statement.
4) Most students prefer drama movies- The highest number of the movie preferred by the students is action movie. Thus this is an incorrect statement.
5) Half of the 7th graders prefer action movies- The 50 percent of the 7th grade is surveyed in which 25 percent like the action movie.25 is the half of the 50. Thus it is a correct statement.