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
zhenek [66]
2 years ago
13

PLEASE HELP !!!!!!!! What is the equation of the directrix for the following parabola: -8(x-5)=(y+1)^2

Mathematics
1 answer:
Mashcka [7]2 years ago
3 0

Answer:

x=7

Step-by-step explanation:

You might be interested in
Can Somebody Solve This Equation ?
Lyrx [107]
30x+10
30•9+10
270+10
280$
7 0
3 years ago
I will give brainliest
DENIUS [597]

Answer:

<u>Candy | Number of People</u>

Chocolate 10

Hard Candy 13

Chewy Candy 9

Step-by-step explanation:

We want to create a table that will show the data from the graph above.

We just have to read the frequencies of the corresponding candies of the bar graph.

The height of the bars tell us the frequencies.

<u>Candy | Number of People</u>

Chocolate 10

Hard Candy 13

Chewy Candy 9

4 0
3 years ago
A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a reading comprehension test. Ba
BartSMP [9]

Answer:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

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".  

Solution to the problem

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=85-1=84

We know that the confidence interval is given by:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

3 0
3 years ago
Zack has an old car. He wants to sell it for 60% off the current price. The
Lelechka [254]

Answer:

300 dollars

Step-by-step explanation:

60% of 500

(60/100) * 500 = 300

4 0
3 years ago
Which sequence is ARITHMETIC?
Rina8888 [55]

Step-by-step explanation:

An arithmetic sequence is a sequence that adds or subtracts the same amount every time, making the answer C. The numbers are increasing by +5 consistently.

4 0
2 years ago
Other questions:
  • Which expressions show the expanded form for 50.029? Choose all answers that are correct. A. 5 × 10 + 0 × 1 + 0 × + 2 × + 9 × B.
    7·2 answers
  • Calcule a porcentagem 8% de R$ 700,00
    5·1 answer
  • Simplify the algebraic expression: 4(3x + y) – 2(x – 5y)
    11·2 answers
  • traversal T intersects line K and J as shown. Which of the following relationships make J parellel to K
    6·1 answer
  • I bought 5 burgers and 2 fries for 17.65 went back bought 2 burgers and 3 fries and paid 10.25. how much does one burger cost an
    11·1 answer
  • 15 + 4x + 12 + 6x in standard form
    9·2 answers
  • Plssssss help I reposted because no one answered my last one please help.
    8·1 answer
  • Pllssss helpppppp plsssssssss
    5·1 answer
  • This is so hard help
    11·2 answers
  • Given the following diagram, what is the value of y? *<br> A) 12<br> B) 6<br> C) 12√2<br> D) 6√2
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!