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
labwork [276]
2 years ago
13

Question 1 (1 point)

Mathematics
1 answer:
bazaltina [42]2 years ago
7 0
Domain: {-4,0,8}
Range: {1,5,10}
You might be interested in
11. Find the roots of x2 - 8x + 4 = 0, in simplest radical form.
Art [367]

Answer: -6=-4 or x=2,3

Step-by-step explanation:

8 0
2 years ago
Solve the system of equations. <br><br> 10x+y=−20 <br><br> y=2x2−4x−16<br><br> ( , ) and ( , )
Sladkaya [172]
I will go about solving this using the elimination method.

First, convert the equations.

10x + y = -20
4x + y = -12

Second, find the easiest variable to get rid of and get rid of it!  (In this case, y)  We will subtract to get rid of y.

6x = -8

Third, you want to solve the equation.

6x = -8 (divide by 6)
x = -1 \frac{1}{3}

Fourth, solve for y by inserting the answer for x into one of the equations.

10(-1 \frac{1}{3}) + y = -20
-13 \frac{1}{3} + y = -20 (subtract -13 \frac{1}{3})
y = -6 \frac{2}{3}

The solution for this system of equations is (-1 \frac{1}{3}, -6 \frac{2}{3}).
7 0
2 years ago
Read 2 more answers
Draw a number line to divide 70÷5
defon
If you need help the answer is 14 use long division or just subtract all depending on what the numbers are.
4 0
2 years ago
Daily-high temperature measurements for 40 consecutive days are recorded for a particular city. The mean daily-high temperature
Vesnalui [34]

Answer:

t=\frac{21.5-22}{\frac{1.5}{\sqrt{40}}}=-2.108    

p_v =P(t_{39}  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the mean temperature actually its NOT significant less then 22 at 1% of signficance.  

(D) P-val=0.021, fail to reject the null hypothesis

Step-by-step explanation:

1) Data given and notation  

\bar X=21.5 represent the mean for the temperatures

s=1.5 represent the sample standard deviation

n=40 sample size  

\mu_o =22 represent the value that we want to test

\alpha=0.01 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 less than 22C, the system of hypothesis would be:  

Null hypothesis:\mu \geq 22  

Alternative hypothesis:\mu < 22  

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{21.5-22}{\frac{1.5}{\sqrt{40}}}=-2.108    

P-value

We can calculate the degrees of freedom like this:

df=n-1=40-1=39

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

p_v =P(t_{39}  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, so we can conclude that the mean temperature actually its NOT significant less then 22 at 1% of signficance.  

The best option would be:

(D) P-val=0.021, fail to reject the null hypothesis

5 0
3 years ago
a car travels 30 1/5 miles in 2/5 of an a hour. what if the average speed, in miles, per hour of the car?
alekssr [168]

Answer:

Average speed = 30.2 miles / .4 hours =

75.5 mph

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the absolute value function f (x) = -|x + 2| - 2 . The vertex of the function is .
    10·1 answer
  • Is it possible for a line to pass through exactly two quadrants? explain.​
    12·2 answers
  • En la clase de Camila hay 28 estudiantes,
    12·1 answer
  • What is 16 over 24 in simplest form
    7·2 answers
  • What is the solution to the system of equations below?
    8·1 answer
  • Find the domain and range of the exponential function h(x) = –343^x. Explain your findings. As x decreases, does h increase or d
    6·1 answer
  • 6x+1 = -8x-13<br> pleasee
    5·2 answers
  • PLEASE HELP MEE EVERYONE IS WASTING MY POINTs PLEASE
    5·1 answer
  • The above figure is:
    15·1 answer
  • 5. What is the degree of the sum of these two polynomials? (5x3 - 2x2 + 1) + (2x2 - 6x4-5) A. 2 B.3 6.4 D.5​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!