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
Vinil7 [7]
3 years ago
10

What is the factored form of the expression? 16. d 2 + 18d + 81 (1 point) (d + 9)(d – 9) (d + 9) 2 (d – 81)(d – 1) (d – 9) 2

Mathematics
1 answer:
jarptica [38.1K]3 years ago
3 0
Since a and c in this equation are perfect squares, you know that the value of the factored form is going to be the (sqrt of a*d added to the sqrt of 81)^2, making(d+9)^2
You might be interested in
HELP IM FAILING MATH I NEED HELP :(
CaHeK987 [17]

Answer:idk

Step-by-step explanation:

idk

7 0
3 years ago
Read 2 more answers
Solve for x squared equals seventeen please <br>x^2 = 17​
Lena [83]

Answer: 4.123 (rounded) or sqrt(17)

Step-by-step explanation: Take the square root of 17.

7 0
3 years ago
I need to find the value of x
nexus9112 [7]

Answer:

15°

Step-by-step explanation:

x= 89-44-30= 15°

:))

6 0
2 years ago
According to sleep researchers, if you are between the ages of 12 and 18 years old, you need 9 hours of sleep to be fully functi
Alexxx [7]

Answer:

d) H0:μ=9 and Ha:μ<9

t=\frac{7.9-9}{\frac{2.1}{\sqrt{28}}}=-2.77    

p_v =P(t_{(27)}  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, we can conclude that the true mean is significantly lower than 9 hours at 5% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=7.9 represent the sample mean

s=2.1 represent the sample standard deviation

n=28 sample size  

\mu_o =9 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 students at this high school are getting too little sleep, the system of hypothesis would be:  

Null hypothesis:\mu \geq 68  

Alternative hypothesis:\mu < 68  

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".  

The best option for this case would be:

d) H0:μ=9 and Ha:μ<9

Calculate the statistic

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

t=\frac{7.9-9}{\frac{2.1}{\sqrt{28}}}=-2.77    

P-value

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

df=n-1=28-1=27  

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

p_v =P(t_{(27)}  

Conclusion  

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, we can conclude that the true mean is significantly lower than 9 hours at 5% of signficance.  

8 0
3 years ago
Greatest to least 1/2 1/5 3/8
Liono4ka [1.6K]

Answer:

1/5 3/8 1/2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is 20% of 5 Please Help
    11·1 answer
  • If 2x+4=10 , then x=3
    9·2 answers
  • Tony ran laps around a track to raise money for a hospital. Tony raised $15 plus $1.50 per lap that he ran. He raised a total of
    5·1 answer
  • Moms pie shop is having a 30% percent off sale on all of its pies. If the pie you want regularly costs $24, what would the disco
    14·1 answer
  • What is the correct answer?
    9·1 answer
  • Solve for x. <br>a.5, <br>b.<br>c.9<br>d.10
    14·2 answers
  • Please help me out??????​
    14·1 answer
  • Which property is illustrated?
    11·1 answer
  • Is 2/9 a perfect square
    8·1 answer
  • What is Seventeen less than three times a number
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!