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
dimulka [17.4K]
3 years ago
12

Derive the equation from the parabola with a focus at (0,1) and a directrix of y=-1

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
3 0

Answer:

y = (x^2)/4

Step-by-step explanation:  

The vertex of this parabola is halfway between the focus (0,1) and the directrix y = -1.  Thus, the vertex is at (0,0).  The variable p represents the distance between focus and vertex, which is 1.  

Thus, adapting the general formula for the equation of a parabola, we have:

4(1)y=x^2, or 4y = x^2, or y = (x^2)/4.


You might be interested in
At what angle does the line 2x=y=2z intersection with ellipsoid
Leni [432]
It will be around four
4 0
3 years ago
5) Find the value of x (pic below)
kirza4 [7]
The answer is D! Hope this helps!
7 0
2 years ago
If the area of quadrilateral SODA is 60, find the value for a.
MrMuchimi

\textit{area of a rectangle}\\\\ A=Lw ~~ \begin{cases} L=length\\ w=width\\[-0.5em] \hrulefill\\ L=a+5\\ w=a-2\\ A=60 \end{cases}\implies 60=(a+5)(a-2) \\\\\\ 60=\stackrel{F~O~I~L}{a^2+3a-10}\implies 0=a^2+3a-70 \\\\\\ 0=(a+10)(a-7)\implies a= \begin{cases} -10\\\\ 7 ~~ \textit{\LARGE \checkmark} \end{cases}

notice, we didn't use the negative value, valid though as it is, because in this case "a" can't be negative.

3 0
1 year ago
From the triangle below, if AD = 5 and CD = 20, find the length of side BD.
krek1111 [17]

The length of side BD, given that AD = 5 and CD = 20 is 10 (Option A)

<h3>Data obtained from the question</h3>
  • Length of side AD = 5
  • Length of side CD = 20
  • Length of side BD =?

<h3>How to determine the length of side BD</h3>

Since the triangles are similar, we can obtain the length of side BD as illustrated below:

CD / BD = BD / AD

20 / BD = BD / 5

Cross multiply

BD × BD = 20 × 5

BD² = 100

Take the square root of both sides

BD = √100

BD = 10

Thus, the length of side BD is 10

Learn more about similar triangles:

brainly.com/question/25882965

#SPJ1

5 0
2 years ago
Read 2 more answers
Find the geometric mean between each pair of numbers.<br> 12 and 2.4
Scorpion4ik [409]

Answer:

about 5.37

Step-by-step explanation:

Geometric mean is

\sqrt[n]{x_1(x_2)(x_n)...} }

So square root of 12(2.4)

square root of 28.8 is

about 5.366563146

or 5.37

3 0
3 years ago
Other questions:
  • THA<br> 8<br> ft<br> 12 ft<br> 18 ft<br> 8 ft<br> 16 ft<br> What’s the total?
    10·2 answers
  • Which angles are vertical angles ? Anyone knows I forgot , I’ll give you best brainliest
    6·1 answer
  • A) name the transversal connecting 1 and 5
    7·1 answer
  • 5x(4-2)2/(-4-(-8)) HELP PLEASE
    13·2 answers
  • 20 points and brainliest answer for correct answer. Photo above. Due by 9:45 today! Hi
    5·1 answer
  • Mitchel needs to make three servings of a pancake recipe . The original recipe calls for 1 1/3 a cup of flour. How much flour do
    11·1 answer
  • rachel owns a cupcake shop. last week she used 42.5 pounds of sugar making cupcakes. this week she used 26 pounds of sugar. find
    10·1 answer
  • Isabel, Lucas, and Aiden had a challenge to see who could bike the farthest in one day. Isabel biked 6 miles, Lucas biked 4 time
    10·2 answers
  • Homework 9.4 Equations and Word Problems
    5·1 answer
  • PLEASE HELP <br> 5|12-r|&gt;15
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!