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
chubhunter [2.5K]
3 years ago
14

HELP! 15 POINTS AND BRAINLIEST!

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
7 0

Answer:

8x squared 3

Step-by-step explanation:

hope this helps hope you get it right answer is d

Artyom0805 [142]3 years ago
6 0

Answer:

d

Step-by-step explanation:

You might be interested in
The circumference of a child's swimming pool that has a radius of 3 feet.
ExtremeBDS [4]
Formula for circumference= (2)(pi)(r) or (pi)(d)
diameter=2r=6ft
6ft*3.14=18.84
7 0
3 years ago
Please help important!!!!!!!!!!!!!!!!!!!!!!!!!!!!
qwelly [4]

Answer:

D

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Solve. 4x + 8 = 2x + 7 + 2x - 20
polet [3.4K]
First you would combine like terms on each side of the equation It would look like this... 4X+8= 4X-13
Then you would add 13 to both sides, the 13 on the right side of the equation would cancel out and the 8 would become 21. It would look like this... 4X+21=4x.
Now you would subtract 4X from both sides. The 4's Would cancel out which would leave you with 21=X

4 0
3 years ago
2+4+2+ 6+4+5+4+6+3+2+2+1
Vitek1552 [10]

Answer:

41

Step-by-step explanation:

we can make it easier by taking the same numbers together

2+2+2+2+4+4+4+6+6+5+3+1

8+12+16+5+3+1

41

hope it helps pls mark me as brainliest

3 0
3 years ago
Read 2 more answers
The amount people who pay for cell phone service varies quite a bit, but the mean
melamori03 [73]

Answer:

a) The mean is $55 and the standard deviation is $0.6957

b) The shape of the sampling distribution of x is approximately normal.

c) 0.0749 = 7.49% probability that the average cell phone service paid by the sample of cell phone users will exceed $56.

Step-by-step explanation:

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

In this question:

Mean of the distribution: 55

Standard deviation of the distribution: 22

Sample of 1000.

This means that:

\mu = 55, \sigma = 22, n = 1000

Part A: What are the mean and standard deviation of the sample distribution of X?

By the Central Limit Theorem, the mean is 55 and the standard deviation is s = \frac{22}{\sqrt{1000}} = 0.6957.

Part B: What is the shape of the sampling distribution of x?

By the Central Limit Theorem, the shape of the sampling distribution of x is approximately normal.

Part C: What is the probability that the average cell phone service paid by the sample of cell phone users will exceed $56?

This is 1 subtracted by the pvalue of Z when X = 56. So:

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{56 - 55}{0.6957}

Z = 1.44

Z = 1.44 has a pvalue of 0.9251

1 - 0.9251 = 0.0749

0.0749 = 7.49% probability that the average cell phone service paid by the sample of cell phone users will exceed $56.

7 0
2 years ago
Other questions:
  • Vivian had a negative account balance of $22.25. She deposited $30 and was then charged a $2.75 fee for the negative balance. Wh
    7·1 answer
  • The product of two numbers is 450. The first number is half the second number. which equation can be used to find x, the greater
    5·2 answers
  • 50 POINTS
    7·1 answer
  • On the first math test, Keiko answered 19 out of 20 correct. On which test did she get a better grade? Write a ratio in faction
    5·2 answers
  • X-7=5 please help me with each step.
    7·2 answers
  • 4vく-20 <br> I need help with this
    13·2 answers
  • What is x? I need help T^T
    11·2 answers
  • A city park in the shape of a rectangle measures 90 yards by 120 yards. A rectangular playground inside the park measures 18 yar
    10·2 answers
  • Use the function f(x) = –2|5-x| – 13 to evaluate f (6).
    11·1 answer
  • Bridget was thinking of a number. Bridget halves the number and gets an answer of 97.3. Form an equation with
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!