1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
timama [110]
3 years ago
14

Plzzzzzz help!! I will give brainliest to whoever answers

Mathematics
2 answers:
jarptica [38.1K]3 years ago
5 0

Answer:

4 and -3 i think

Step-by-step explanation:

the dot is on 4 and -3

11Alexandr11 [23.1K]3 years ago
3 0

Answer:

I think it is (4,-3)

Step-by-step explanation:

You might be interested in
If 64^-5 = 2^x, what is the value of x?
lapo4ka [179]

Answer:

lhsvlsblsbbkeblsvlsvlsvkahoelbevlevoe

8 0
2 years ago
FINDING PERIMETER need help right now<br>​
Leni [432]

Answer:

if you want to find perimeter you must do addition for the corners. For example on long side in the regtangle the number is 4. And the short side is 6. The one thing we must do is addition. Than the answer will be 10. You're welcome.

6 0
2 years ago
Determine whether each pair of actions results in independent or dependent events.
Norma-Jean [14]

Answer h:

Step-by-step explanation:

8 0
2 years ago
Jill’s bowling scores are approximately normally distributed with mean 170 and standard deviation 20, while Jack’s scores are ap
miss Akunina [59]

Answer:

a) The probability of Jack scoring higher is 0.3446

b) They probability of them scoring above 350 is 0.2119

Step-by-step explanation:

Lets call X the random variable that determines Jill's bowling score and Y the random variable that determines jack's. We have

X \simeq N(170,400)\\Y \simeq N(160,225)

Note that we are considering the variance on the second entry, the square of the standard deviation.

If we have two independent Normal distributed random variables, then their sum is also normally distributed. If fact, we have this formulas:

N(\lambda_1, \sigma^2_1) + N(\lambda_2, \sigma^2_2) = N(\lambda_1 + \lambda_2,\sigma^2_1 + \sigma^2_2) \\r* N(\lambda_1, \sigma^2_1) = N(r\lambda_1,r^2\sigma^2_1)  

for independent distributions N(\lambda_1, \sigma^2_1) , N(\lambda_2, \sigma^2_2) , and a real number r.

a) We define Z to be Y-X. We want to know the probability of Z being greater than 0. We have

Z = Y-X = N(160,225) - N(170,400) = N(160,225) + (N(-170,(-1)^2 * 400) = N(-10,625)

So Z is a normal random variable with mean equal to -10 and vriance equal to 625. The standard deviation of Z is √625 = 25.

Lets work with the standarization of Z, which we will call W. W = (Z-\mu)/\sigma = (Z+10)/25. W has Normal distribution with mean 0 and standard deviation 1. We have

P(Z > 0) = P( (Z+10)/25 > (0+10)/25) = P(W > 0.4)

To calculate that, we will use the <em>known </em>values of the cummulative distribution function Φ of the standard normal distribution. For a real number k, P(W < k) = Φ(k). You can find those values in the Pdf I appended below.

Since Φ is a cummulative distribution function, we have P(W > 0.4) = 1- Φ(0.4)

That value of Φ(0.4) can be obtained by looking at the table, it is 0.6554. Therefore P(W > 0.4) = 1-0.6554 = 0.3446

As a result, The probability of Jack's score being higher is 0.3446. As you may expect, since Jack is expected to score less that Jill, the probability of him scoring higher is lesser than 0.5.

b) Now we define Z to be X+Y Since X and Y are independent Normal variables with mean 160 and 170 respectively, then Z has mean 330. And the variance of Z is equal to the sum of the variances of X and Y, that is, 625. Hence Z is Normally distributed with mean 330 and standard deviation rqual to 25 (the square root of 625).

We want to know the probability of Z being greater that 350, for that we standarized Z. We call W the standarization. W is s standard normal distributed random variable, and it is obtained from Z by removing its mean 330 and dividing by its standard deviation 25.

P(Z > 350) = P((Z  - 330)/25 > (350-330)/25) = P(W > 0.8) = 1-Φ(0.8)

The last equality comes from the fact that Φ is a cummulative distribution function. The value of Φ(0.8) by looking at the table is 0.7881, therefore P(X+Y > 350) = 1 - Φ(0.8) = 0.2119.

As you may expect, this probability is pretty low because the mean value of the sum of their combined scores is quite below 350.

I hope this works for you!

Download pdf
6 0
3 years ago
2/4+5/6+7/2-1/2=¿¿¿¿
vitfil [10]
2/4+5/6+7/2=29/6-1/2=26/6=13/3=4 1/3
5 0
3 years ago
Other questions:
  • Question 4
    9·1 answer
  • Please answer, 20 points, thanks, and brainiest. Improper answers will be reported so dont comment 'idk' just to get points.
    13·2 answers
  • 11 times a number increased by 2 is the same as 6 more than 9 times the number .Find the number.
    8·1 answer
  • The gym at evergreen school has three basketball courts . there are 5 players on each of the courts . how many players are there
    10·1 answer
  • I’ll give brainliest! I need this answered by tomorrow!!
    7·1 answer
  • A multiple choice test has 10​ questions, each of which has 4 possible​ answers, only one of which is correct. If​ Judy, who for
    11·1 answer
  • A clothing truck is shaped like a rectangular prism. The volume of the truck is 15 ft.³. The area of the base of the container i
    5·1 answer
  • The snake habitat at the nature center is made by connecting two terrariums. The first terrarium is 40\text { cm}40 cm long, 25\
    7·1 answer
  • What are the domain and range of the mathematical function f(x)=x-3
    10·1 answer
  • Pls hel me I’m stuck on this question
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!