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
a_sh-v [17]
3 years ago
6

What is the slope of the line that passes through the points (–1, –17) and (–4, –2)?

Mathematics
1 answer:
ExtremeBDS [4]3 years ago
6 0
Hello!

To find the slope of a line, we use the formula y2-y1/x2-x1.

Each ordered pair can either represent the 1,s or the 2,s and the slope will be the same. For our example, lets have (-1,-17) represent (x1,y1) and (-4.-2) represent (x2,y2). 

We will plug these values into the equation.

-2+17/-4+1
15/-3
-5

The slope of the line is -5, but let's check our answer by switching the 1's and 2's.

-17+2/-1+4
-15/3
-5

The slope of the line is -5.

I hope this helped you!

You might be interested in
What is the solution for the equation a+ 8/3 = 2/3
Sonbull [250]
a+ \frac{8}{3}= \frac{2}{3}\\\\a= \frac{2}{3}- \frac{8}{3}\\\\a= \frac{-6}{3}\\\\\boxed{a=-2}
6 0
3 years ago
Read 2 more answers
Find the vertex of the parabola formed by the following quadratic function: y = 3x^2 – 6x + 2
storchak [24]
Vertex form is y=a(x-h)^2+k, so we can rearrange to that form...

y=3x^2-6x+2  subtract 2 from both sides

y-2=3x^2-6x  divide both sides by 3

(y-2)/3=x^2-2x, halve the linear coefficient, square it, add it to both sides...in this case:  (-2/2)^2=1 so

(y-2)/3+1=x^2-2x+1  now the right side is a perfect square

(y-2+3)/3=(x-1)^2

(y+1)/3=(x-1)^2  multiply both sides by 3

y+1=3(x-1)^2  subtract 1 from both sides

y=3(x-1)^2-1  so the vertex is:

(1, -1)

...

Now if you'd like you can commit to memory the vertex point for any parabola so you don't have to do the calculations like what we did above.  The vertex of any quadratic (parabola), ax^2+bx+c is:

x= -b/(2a),   y= (4ac-b^2)/(4a)

Then you will always be able to do a quick calculation of the vertex :)
7 0
3 years ago
A group of 18 people ordered soup and sandwiches for lunch. Each person in the group had either one soup or one sandwich. The sa
Black_prince [1.1K]
X - the number of sandwiches
y - the number of soups

x+y=18 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \  |\times (-4.5) \\
7.75x+4.5y=113.5 \\ \\
-4.5x-4.5y=-81 \\
\underline{7.75x+4.5y=113.5} \\
7.75x-4.5x=113.5-81 \\
3.25x=32.5 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \  |\div 3.25 \\
x=10

10 sandwiches were ordered. The answer is D.
6 0
3 years ago
Read 2 more answers
find a rational number that is between 5.2 and 5.5. Explain why it is rational Find an irrational number between 5.2 and 5.5. Ex
DedPeter [7]

A rational number is 5.3 . It's rational because it can be written as a fraction a/b

- that is 5 3/10 or   53/10.

An irrational number between the 2 values would be √29

Enter this into ur calculator and you'll get an answer like 5.385164807  but this number  carries on beyond bounds and can't be written as a fraction a/b  It is irrational.


6 0
3 years ago
Read 2 more answers
Which equation represents the line passing through the points (4, −1) and (1, 0)? Select one: A. x + 3y = 1 B. 3x + y = 1 C. x −
Alekssandra [29.7K]

Answer:

Step-by-step explanation:

Gradient of a line =( y2 - y1)/x2 - x1

From the question, x1=4,y1=-1,x2=1,y2=0.

Therefore, substitute for these values in the above formula

m = 0-(-1)/1-4

= 0+1/-3

= -1/3.

Therefore, y-y1/x-x1 = -1/3

y - y1 = -1/3(x - x1)

y - (-1) = -(x-x1)/3

y+1 = - (x - 4)/3

Multiply through by 3

3y+3= -x+4

3y +x=4-3

x+3y= 1

Therefore the answer is A.

7 0
3 years ago
Other questions:
  • Can someone help me please<br><br> It would really help.
    12·1 answer
  • 3.1 Q17
    9·1 answer
  • Mr. Flowers 23 1/4 of land. He is going to 1/3 the acreage. He will sell the rest as 1/2-acrea lots. How many lots will he have
    12·1 answer
  • What type of angle is ∠CEB ?<br><br><br> acute<br><br> right<br><br> obtuse<br><br> straight
    5·2 answers
  • helene is selling cupcakes for $0.50 each. The function f(x)=0.5x gives the total amount of money here makes after selling x cup
    12·1 answer
  • In isla hoste, what is the average net change in temperature, from the high to the low, in August.​
    13·1 answer
  • A bag contains five white balls and four black balls. Your goal is to draw two black balls. You draw two balls at random. What i
    9·1 answer
  • WILL GIVE BRAINLIEST LOOK AT PHOTOS FOR QUESTION
    6·1 answer
  • Nick walked 5 miles to reach his aunt's house. From there he traveled 8 miles to the shopping mall on a bicycle. He traveled 80%
    7·1 answer
  • Which function has an inverse that is also a function? y = 3 2 - 5 3 y = 322 y= x - y = 322 – 5x + 3
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!