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
Goshia [24]
2 years ago
5

A straight line intersects the curved graph y=x^2-4x at the point where x=-1 and x=-2. Work out the equation of the straight lin

e.
Mathematics
2 answers:
mestny [16]2 years ago
7 0
Y = -7x - 2 Use the two points given to find the slope (m) m = (y2 - y1) / (x2 - x1) m = ( 12-5 ) / (-2 - (-1)) m = -7 Now we have y = -7x + b where 'b' is our y-intercept. We can solve for 'b' by choosing one of the (x,y) coordinate points and plugging them in. Let's choose the point (-1,5). Plug -1 in for 'x' and 5 in for 'y' and solve for 'b'. y = -7x + b 5 = -7(-1) + b b = -2 Final eqn: y = -7x - 2
Luba_88 [7]2 years ago
7 0
Where x=-1:
Y= (-1)^2 - 4(-1)
Y= 1 - -4
Y= 5

Where x=-2:
Y= (-2)^2 - 4(-2)
Y= 4 - - 8
Y= 12

Now we calculate the gradient/slope:

m= y2-y1/x2-x1
m= (12 - 5)/(-2 - -1)
m= 7/-1

Finally, the y-intercept:

y= -7x + c
Using any of the known points from earlier (-1,5) or (-2,12)
5= -7(-1) + c
5 -7 = (7 - 7) + c
-2 = c

The equation is y = -7x - 2
You might be interested in
What is the greatest common factor of the numerator and denominator in the expression
adelina 88 [10]

Answer:

Hi i think that the answer is A

7 0
3 years ago
will the opposite of a number always,sometimes,or never be greater than the number itself??????? can someone do an example and a
weeeeeb [17]

When the number is positive, its opposite is less than the number.

9 ==> -9 . . . . . . less
72 ==> -72 . . . . less
324 ==> -324 . . less


When the number is negative, its opposite is greater than the number.

-8 ==> 8 . . . . . . greater
-3/4 ==> 3/4 . . . greater
-429 ==> 429 . . greater .

We've seen that the opposite can be less, and it can also be greater.
I guess that means that it's sometimes greater.

8 0
3 years ago
Read 2 more answers
300 minutes equals how many hours
Nimfa-mama [501]
300 minutes equals five hours.
5 0
3 years ago
Read 2 more answers
Will give correct answer brainliest
evablogger [386]

ST ~ FM

T ~ M

JS ~ BF

S ~ F

hope this hellpss

3 0
2 years ago
Carmen is mailing packages. Each small package costs her $2.60 to send. Each large package costs her $3.40. How much will it cos
Fantom [35]

Answer:

By themselves $18.20, $13.60, and together $31.80

Step-by-step explanation:

$2.60 multiplied by 7 equals $18.20

$3.40 multiplied by 4 equals $13.60

Together this equals $31.80

6 0
3 years ago
Other questions:
  • the local bakery uses 1.75 cups of flour in each batch of cookies. The bakery used 5.25 cups this morning. How many batches of c
    8·2 answers
  • State the slope and y-intercept
    7·1 answer
  • I need help on 1 pleased
    12·1 answer
  • Can you find a shortcut in doing two translations in geometry
    14·1 answer
  • What is the value of s?<br> units
    13·2 answers
  • Bea can run 1/6 mile in 2 minutes. How long should it take her to run 2 miles?
    12·2 answers
  • What is the point-slope form of a line that has a slope of 3 and passes through the point (-1, 4)?
    6·2 answers
  • The cost of a school banquet is 64 + 14n, where n is the number of people attending. What is the cost for 67 people
    6·1 answer
  • Please help fast I’ll give you brainless plus a bunch of points I need the whole radical
    10·1 answer
  • Hello! :)
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!