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
lora16 [44]
3 years ago
11

Help and I'll help back

Mathematics
1 answer:
son4ous [18]3 years ago
3 0
8y^4 is the solution
You might be interested in
Evaluate the problem -3-(+4)
Tcecarenko [31]

Answer:

-7

Step-by-step explanation:

-3 - (4) = ?

Remove parentheses:

=  -3 - 4

Subtract the numbers:

= -7

3 0
3 years ago
Read 2 more answers
Find the value of x. Show work if you can
vova2212 [387]

Answer:

Step-by-step explanation:

number of side = n =7

Sum of all the angles of  given polygon = (n -2)*180 = 5 *180 = 900

x + 140 +133 +145 + 117 + 119 + 125 = 900

                                             x +  779 = 900

                                                    x     = 900 - 779

x = 121

4 0
3 years ago
What is 1.5 Devided by 1
VARVARA [1.3K]

Answer:

1.5

Step-by-step explanation:

Anything divided by 1 is itself

6 0
3 years ago
Read 2 more answers
A maker of a certain brand of low-fat cereal barsclaims that the average saturated fat content is 0.5gram. In a random sample of
finlep [7]

Answer:

t=\frac{0.475-0.5}{\frac{0.183}{\sqrt{8}}}=-0.386    

p_v =2*P(t_{(7)}  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the true mean is different from 0.5 at 5% of signficance.  So then the claim makes sense

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

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=0.475

The sample deviation calculated s=0.183

We need to conduct a hypothesis in order to check if the true mean is 0.5 or no, the system of hypothesis would be:  

Null hypothesis:\mu = 0.5  

Alternative hypothesis:\mu \neq 0.5  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{0.475-0.5}{\frac{0.183}{\sqrt{8}}}=-0.386    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=8-1=7  

Since is a two sided test the p value would be:  

p_v =2*P(t_{(7)}  

Conclusion  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the true mean is different from 0.5 at 5% of signficance.  So then the claim makes sense

4 0
3 years ago
Read 2 more answers
At a lake recreation park, you can rent a kayak for a base fee of $16 plus an hourly fee of $4. Katie spent $56 on a kayak renta
Alenkinab [10]
I think the equation would be 4x + 16= 56
She rented the kayak for 10 hours.
4 0
3 years ago
Other questions:
  • Write an expressions that is equivalent to 6c-2/2 +2c+11 in simplest form
    13·1 answer
  • What is 16 percent of $36.48 ?
    8·1 answer
  • The table below represents an exponential function, g, that has been vertically shifted from the parent function, f(x)= 2^x. Det
    7·1 answer
  • In a plane, the distinct lines AB and CD intersect at A, where A is between C and D. The measure of BAC is 54 Degrees, what is t
    12·1 answer
  • When testing μ, how do we decide whether to use the standard normal distribution or a Student's t distribution? If the x distrib
    5·1 answer
  • Krysta picks a marble at random, puts it back, and then picks another marble at random.
    9·1 answer
  • A line passes through points (0, k) and (4.0) and has a slope of -2.5. Which statements are true regarding the graph of the line
    12·1 answer
  • Traza un angulo que dea mayor que el angulo 1 y menor que el 2​
    15·1 answer
  • Given f(x)=4x^2 and g(x)=-1/5x^2 choose true or false
    8·2 answers
  • which answer choice is it?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!