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
artcher [175]
3 years ago
10

The graph of an equation with a negative discriminant always has which characteristic?

Mathematics
2 answers:
borishaifa [10]3 years ago
7 0
<span>Final answer:- no x-intercept. 

The x intercept is where the line crosses the x axis on a graph. 

</span>
Troyanec [42]3 years ago
3 0

it can also be explained as A on edg :)

You might be interested in
A counselor at a community college claims that the mean GPA for students who have transferred to State University is more than 3
Lena [83]

Answer:

t=\frac{3.25-3.1}{\frac{0.3}{\sqrt{36}}}=3  

If we compare the p value and the significance level for example \alpha=1-0.99=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis.

And the best conclusion would be:

a) Yes. The counselor's claim is valid

Because we reject the null hypothesis in favor to the alternative hypothesis.

Step-by-step explanation:

Data given and notation  

\bar X=3.25 represent the sample mean

s=0.3 represent the sample standard deviation

n=36 sample size  

\mu_o =3.1 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is more than 3.1, the system of hypothesis would be:  

Null hypothesis:\mu \leq 3.1  

Alternative hypothesis:\mu > 3.1  

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{3.25-3.1}{\frac{0.3}{\sqrt{36}}}=3  

P-value  

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

df=n-1=36-1=35  

Since is a one right tailed test the p value would be:  

p_v =P(t_{(35)}>3)=0.00247  

Conclusion  

If we compare the p value and the significance level for example \alpha=1-0.99=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis.

And the best conclusion would be:

a) Yes. The counselor's claim is valid

Because we reject the null hypothesis in favor to the alternative hypothesis.

5 0
3 years ago
Simplify the following expression 5^2-4/5+2
Misha Larkins [42]
131/5 is your answer

3 0
3 years ago
At your gym, the bar you lift weighs 45 pounds. You add weights to the bar that are 10 pounds each. If you add 8 weights to the
lana66690 [7]
45 plus 80 which is 125 pounds
4 0
3 years ago
Read 2 more answers
Addies has 7 grades on her report card. The overall average is 77%. One grade was incorrectly recorded as 18% instead of the act
inessss [21]
77(7) = 539, the total points of all her tests

539 - 18 + 81 = correct total points = 602

602/7 = 86 which is the new average
4 0
3 years ago
Here are my points idc anymore
RSB [31]

Answer:

Thanks for the free points

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • A bag contains 3 red marbles 4 blue marbles and 7 Green marbles if two marbles are drawn out of the bag what is the probability
    8·1 answer
  • 4x-8=<br><img src="https://tex.z-dn.net/?f=4x%20-%208%20%3D%20%20-6x%20%2B%2012" id="TexFormula1" title="4x - 8 = -6x + 12" alt
    7·1 answer
  • Simplify 6(x+y)+(x-y)
    6·2 answers
  • Write the subraction problem 604-357. describe how you will subtract to find the difference
    14·2 answers
  • Help please i need to pass
    14·1 answer
  • Rose’s grandmother is 89 years old. She can knit mittens somewhere between 13 and 16 hours. If she wants to knit 36 mittens for
    5·2 answers
  • What is the area of the parallelogram shown? 8 and 12
    14·2 answers
  • What is it the difference between the integers -11 and -3​
    8·2 answers
  • Simplify 6^-3/6^5<br>answers:<br>• 6^8<br>• 6^-2<br>• 1/6^8<br>• 1/6^2​
    8·1 answer
  • P(A) = .6, P(B) = .3, P(
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!