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
Leto [7]
3 years ago
12

What is the equation for a parabola with a focus of (0,-4) and a directrix of y=4 if the vertex is at the origin?..1)..y=1/16x2.

.2)..x=1/16y2..3)..y=1/32x2..4)..y= -1/16x2.
Mathematics
1 answer:
OlgaM077 [116]3 years ago
3 0

Answer:

y = - \frac{1}{16} x²

Step-by-step explanation:

Since the vertex is at the origin and the focus at (0, - 4) then the parabola opens vertically down with equation

x² = 4py ( p is the distance from the vertex to the focus )

Here p = - 4 ( focus is below the vertex ), thus

x² = 4(- 4)y = - 16y ( divide both sides by - 16 )

y = - \frac{1}{16} x²

You might be interested in
Dennis has made a purchase of $50,000
ivanzaharov [21]

Really? On what? Man thats a lot of money.

6 0
2 years ago
I need help what’s 6.4 divided by 1.6
Tanya [424]

Answer:

4

Step-by-step explanation:

6.4 / 1.6 = 4

1.6 goes into 6.4 four times

7 0
3 years ago
Read 2 more answers
Solve: 4x + 6 = 8x - 18
sladkih [1.3K]

Answer:

x=-3

Step-by-step explanation:

4x+6=8x+18

We simplify the equation to the form, which is simple to understand  

4x+6=8x+18

We move all terms containing x to the left and all other terms to the right.  

+4x-8x=+18-6

We simplify left and right side of the equation.  

-4x=+12

We divide both sides of the equation by -4 to get x.  

x=-3

5 0
3 years ago
Read 2 more answers
You guys are life savers but does anyone know the answers to these questions? I’m so confused rn
timofeeve [1]

Answer:

The third choice

Step-by-step explanation:

We need to find the slope and y-intercept of the line and then put it into y = mx = b form. To find the slope, pick a point on the line; I will use (-2, 5); count how many units up you need to go to get to the next point on the line, which in this case it would be 3. The count how many to the right or left you would need to go, which is 1 to the left. Moving left means a negative, so it is -1. Your slope fraction would be \frac{3}{-1} , since slope is rise over run. You can sub this fraction in for m in y = mx + b, which will give you a revised equation of y = -3x = b. To find the y intercept, or b, just find the point where the line crosses the y-axis, which is -1. So, the equation is now y = -3x - 1.The correct answer is third choice.

6 0
3 years ago
I need help with part B plz help me asap
Sloan [31]

Answer:

see below    PLEASE GIVE BRAINLIEST!!

Step-by-step explanation:

A)  2.40A ≦ 9.60

B) You can choose to purchase between 0 and 4 avacados.  4 is the maximum you can buy because 2.40 x 4 = 9.60 and that is all the money you have and more than 4 would make the equation incorrect.  0 is the least you can buy since you can't purchase a negative amount of something.

So, A ≦ 4

6 0
3 years ago
Other questions:
  • Divide 260 in to the ratio of 1:3
    13·2 answers
  • Solve the system of equations using a matrix <br> X+3y=5<br> X+4y=6
    6·1 answer
  • Why do systems of nonlinear equations sometimes have more than one solution
    11·1 answer
  • You and your friend decide to conduct a survey at your school to see whether students are in favor of a new dress code policy. Y
    10·1 answer
  • What is the answer for that question please?
    8·2 answers
  • What is the perimeter of the shaded figure?
    6·1 answer
  • What do the following two equations represent? • y-8=1/5(x+5) • y-8=-1/2(x+5)
    14·1 answer
  • PLEASE ANSWER REAL
    12·1 answer
  • Larry saves 15% of his annual salary for retirement. This year his salary was $2000 more than last year and he saved $3300. What
    10·1 answer
  • Look at the table showing prices of different items at a store.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!