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
andrey2020 [161]
3 years ago
9

The focus of a parabola is (−5,−1) and the directrix is y=−3.

Mathematics
1 answer:
Bingel [31]3 years ago
8 0
(x+5)^2=4(y+2)

the equation for a parabola with focus (h, k+p) and directrix y=k-p is 
(x-h)^2=4p(y-k)

so using your directrix y=-3, and knowing directrix is y=k-p, you have 
-3=k-p.
similarly, knowing the focus is defined by (h,k+p) and your focus is (-5,-1)
you have the equation -1=k+p.

you now have a system of equations
-3=k-p \\ -1=k+p
which you can solve using any method, I will use elimination.
adding down
-4=2k \\ -2=k
you now have k and can find p using either equation. 
-3=k-p \\ -3=-2-p \\ -1=-p \\ 1=p.

now you plug those in, getting the answer
(x+5)^2=4(y+2)
You might be interested in
What times 3 equal 19?
Gnesinka [82]

Answer:

6.3333333333333333333333333333333333333333333333333333333333

Step-by-step explanation:

19/3=6.3333333333333333333333333

6 0
3 years ago
Read 2 more answers
Write all the possible names for the quadrilateral. Then give the best name.
Margaret [11]

Answer:

Rhombus, parallelogram, trapezoid, rectangle

C. quadrilateral, trapezoid; trapezoid

Step-by-step explanation:

This is a quadrilateral, it has 4 sides, it is not a rhombus because its sides aren't equal, it isn't a parallelogram because only two of its sides are parallel

7 0
2 years ago
Read 2 more answers
The perimeter of a rectangle is 30 inches. It’s area is 44 square inches. Find its length and width.
Verizon [17]

Answer:

length 11 width 4

Step-by-step explanation:

perimeter:

11+11=22

4+4=8

22+8=30

area:

11*4=44

4 0
2 years ago
Combine like terms 18x-(-7x)+31-(-37)-5x
viktelen [127]

Answer:

20x+68

Step-by-step explanation:

6 0
2 years ago
Add. reduce to lowest terms.<br> 6 4/5 + 3 7/10=
KiRa [710]
I would like to help but i dont know either
7 0
3 years ago
Other questions:
  • The cost of a cab ride is $10 for the first mile or part of a mile. It costs $3 for each additional mile or part of a mile and a
    13·2 answers
  • What is the limit of cosine as x approaches infinity?
    14·1 answer
  • What number am I
    9·1 answer
  • "The inverse of every function must be a function itself." State whether you agree or disagree with the statement providing evid
    11·1 answer
  • Which equation represents exponential decay?
    15·1 answer
  • 2. Jessica is a waitress. Her customer’s bills totaled $300. She earned $45 in tips. What percent did her customers tip her? ___
    13·2 answers
  • What's the awnser to the one about Isabella
    10·1 answer
  • Can someone help me with this and tell me the steps too
    10·2 answers
  • 3(x – 9)2 + 15 = 195<br> Solving quadratics with square root
    9·1 answer
  • The following set of random numbers represents 20 simulations of three daily
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!