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
8090 [49]
2 years ago
6

Help pleaseee ASAP ASAP

Mathematics
1 answer:
Yanka [14]2 years ago
7 0

Answer:

I think the answer is the third one

Step-by-step explanation:

You might be interested in
What is the value of n?<br>enter answer in box​
nalin [4]

Answer:

6!

Step-by-step explanation:

chord x chord = chord x chord

(5) (n+8) = (7) (n+4)

i just started plugging in numbers

(5) (6+8) = (7) (6+4)

5 x 14 = 7 x 10

70=70

4 0
3 years ago
Scores on the SAT Mathematics test are believed to be normally distributed. The scores of a simple random sample of five student
AysviL [449]

Answer:

The mean calculated for this case is \bar X=584

And the 95% confidence interval is given by:

584-2.776\frac{86.776}{\sqrt{5}}=476.271    

584+2.776\frac{86.776}{\sqrt{5}}=691.729    

So on this case the 95% confidence interval would be given by (476.271;691.729)    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the mean and the sample deviation we can use the following formulas:  

\bar X= \sum_{i=1}^n \frac{x_i}{n} (2)  

s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}} (3)  

The mean calculated for this case is \bar X=584

The sample deviation calculated s=86.776

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=5-1=4

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-T.INV(0.025,4)".And we see that t_{\alpha/2}=2.776

Now we have everything in order to replace into formula (1):

584-2.776\frac{86.776}{\sqrt{5}}=476.271    

584+2.776\frac{86.776}{\sqrt{5}}=691.729    

So on this case the 95% confidence interval would be given by (476.271;691.729)    

3 0
2 years ago
I WILL MARK YOU BRAINLIEST!
guajiro [1.7K]

Answer:

the answer is 12 inches

every inche equals 15 feet from 30/2 then divide it by the total 180/15 which equals 12

3 0
2 years ago
Read 2 more answers
what is the probability that a randomly chosen number is less than or equal to 90 and is a multiple of 17
kodGreya [7K]

Answer:

let's see...

we have total possible outcomes.. = 90 ( from 1 to 90)

Desiree outcomes..= 5 ( 17,34,51,68,85)

and therefore.. the probability is 5/90 = 1/18.

here you go.. that should be correct I hope.

3 0
2 years ago
What is the complete factorization of the polynomial below?<br> x3 + 2x2 + 4x + 8
telo118 [61]

Answer:

i think its D

sry if im wrong

step-by-step explanation:

5 0
2 years ago
Other questions:
  • Twelve more than the product of a number and four is fewer than 60.
    15·1 answer
  • How can you solve an equation with a variable on both sides
    10·2 answers
  • PLEASE ANSWER ASAP
    6·1 answer
  • PLEASE HELP FASTTTT THX!<br> CHECK MY ANSWER
    10·1 answer
  • Ms. Amos has a rectangular pool table and Ms. Wheeler has a miniature ping pong table in the shape of a rectangle.
    15·1 answer
  • Find the value of x and the value of y.
    7·1 answer
  • Find the equation of the line that passes through points a and b. <br> Please help.
    5·1 answer
  • 2. It has been estimated that about 30% of frozen chickens are contaminated with enough salmonella bacteria to cause illness if
    13·1 answer
  • WHAT IS A 2ND DEGREE POLYNOMIAL FUNCTION WHOSE GRAPH HAS ONLY POSITIVE Y-VALUES
    7·1 answer
  • Find the area of this triangle.<br> 6 ft<br> 10 ft
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!