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
Wittaler [7]
2 years ago
7

Write the point slope form of an equation of the line through the points (-7,7) and (4,1)

Mathematics
2 answers:
Andre45 [30]2 years ago
8 0
  • (-7,7)
  • (4,1)

Slope:-

  • m=1-7/4+7
  • m=-6/11

Equation in point slope form

  • y-7=-6/11(x+7)

Option A

jolli1 [7]2 years ago
3 0

Answer:

\textsf{A)} \quad y-7=-\dfrac{6}{11}(x+7)

Step-by-step explanation:

<u>Step 1:  Find the slope</u>

Define the points:

\textsf{let}\:(x_1,y_1)=(-7,7)

\textsf{let}\:(x_2,y_2)=(4,1)

Use the <u>slope formula</u> to find the slope:

\textsf{slope}\:(m)=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{1-7}{4-(-7)}=-\dfrac{6}{11}

<u>Step 2:  Find the equation</u>

Use the found slope from step 1 together with one of the given points in the <u>point-slope form of a linear equation</u>:

\implies y-y_1=m(x-x_1)

\implies y-7=-\dfrac{6}{11}(x-(-7))

\implies y-7=-\dfrac{6}{11}(x+7)

<u>Conclusion</u>

Therefore, the equation of the line that passes through the points (-7, 7) and (4, 1) is:

y-7=-\dfrac{6}{11}(x+7)

You might be interested in
A random sample of size n1= 25, taken from a normal population with a standard deviation σ1= 5, has a mean X1= 80. A second rand
sesenic [268]

Answer:

The 94% confidence interval would be given by 2.898 \leq \mu_1 -\mu_2 \leq 7.102

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_1 =80 represent the sample mean 1

\bar X_2 =75 represent the sample mean 2

n1=25 represent the sample 1 size  

n2=36 represent the sample 2 size  

\sigma_1 =5 sample standard deviation for sample 1

\sigma_2 =3 sample standard deviation for sample 2

\mu_1 -\mu_2 parameter of interest.

The confidence interval for the difference of means is given by the following formula:  

(\bar X_1 -\bar X_2) \pm z_{\alpha/2}\sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2}} (1)  

The point of estimate for \mu_1 -\mu_2 is just given by:

\bar X_1 -\bar X_2 =80-75=5

Since the Confidence is 0.94 or 94%, the value of \alpha=0.06 and \alpha/2 =0.03, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.03,0,1)".And we see that z_{\alpha/2}=1.88  

The standard error is given by the following formula:

SE=\sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2}}

And replacing we have:

SE=\sqrt{\frac{5^2}{25}+\frac{3^2}{36}}=1.118

Confidence interval

Now we have everything in order to replace into formula (1):  

5-1.88\sqrt{\frac{5^2}{25}+\frac{3^2}{36}}=2.898  

5+1.8\sqrt{\frac{6^2}{36}+\frac{7^}{49}}=7.102  

So on this case the 94% confidence interval would be given by 2.898 \leq \mu_1 -\mu_2 \leq 7.102  

7 0
3 years ago
Please, I need help on this problem
MrMuchimi
Anyone sees the problem? I can’t see it.
5 0
3 years ago
A rectangle or field is 62 m long and 48 m wide Diana estimate the length of the field to be 60 m and the ways to be 45 m what i
Ostrovityanka [42]

Answer:

To make estimates, we usually round the numbers the nearest integer.

Since 1.9 is closest to 2 than it is to 1, the nearest integer of 1.9 is 2.

Similarly, since 4.4 is closest to 4 than it is to 5, the nearest integer of 4.4 is 4.

Now, to estimate the area of the farm, we are going to multiply our two integers:

Estimated Area of the Farm= x

Since 8 is between 4 and 10, we can conclude that the best estimate of the area of the farm is: between 4 and 10

Step-by-step explanation:

7 0
2 years ago
What is the sum of 2.335 and 8.773
GrogVix [38]

Answer:

11.108

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Write this fraction as a sum or difference.<br><br> 17. 9p-63
Alex787 [66]
P=7 because when you do bring 63 on the other side it'll be 9p=63 and after that divide both sides by 9 and you'll have p=7
5 0
3 years ago
Other questions:
  • A marble is drawn at random from a bag containing 2 blue marbles, 3 yellow marbles, and 7 orange marbles. What is the probabilit
    14·1 answer
  • In ΔOPQ, the measure of ∠Q=90°, PO = 17, QP = 8, and OQ = 15. What ratio represents the tangent of ∠P?
    11·1 answer
  • NEED ANSWER ASAP!!!! IM TIMED!!
    5·1 answer
  • Are the expressions -0.5(3x + 5) and -1.5x + 2.5 equivalent? Explain why or why not
    15·2 answers
  • A convex hexagon has interior angle measures of 150 degrees, 3x, 2x, 4x + 24, and 3x + 50.
    15·1 answer
  • If, f(x) = x^2 + 3x -2, then f(a + 1) =<br><br> I hate homework
    6·1 answer
  • Josh is planning a trip to the Dominican republic. He needs at least $1,200 cover airfare and his hotel. Josh has $800 and makes
    10·1 answer
  • Find the sales tax :<br>$32 meal with a 6% tax<br>Tax = $__​
    8·2 answers
  • Write the following phrase<br> as an<br> inequality: 3 more than twice n is at most 50.
    12·2 answers
  • Please Help, I don't understand how I get one of the answers below
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!