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
cestrela7 [59]
3 years ago
11

Which equation represents a parabola opening to the left with a vertex at the origin and a focus at (-7, 0)?

Mathematics
1 answer:
madam [21]3 years ago
4 0

Answer:

<h3>b. x=1/28 y^2</h3>

Step-by-step explanation:

the standard equation,

                      y^{2} = 4ax  ---(1)    , when opening towards left or right

                      focus at (a , 0)

                      x^{2} = 4ay ---(2)      , when opening towards top or bottom

                      focus at (0,  a)

                                             

if a is negative parabola will open toward negative axes ( down or left) and vice versa.

re- arranging option b. we get

                        y^{2} =28 x\\y^{2} = 4 X (-7 x) -----(3)

therefore, a =  -7

(3) is similar to (1)

So it is facing left with focus at (-7,0)

You might be interested in
If an angle’s measure is between 90° and 180° then it is said to be a(n)_______angle..
lana [24]

Answer: It is said to be an obtuse angle.

Step-by-step explanation:

Angles under 90 degrees are called acute angles.

Angles that are equivalent with 90 degrees are right angles.

Angles that measure more than 90 degrees but under 180 degrees are called obtuse.

Angle that have the same measure as 180 degrees are straight angle.

3 0
3 years ago
Read 2 more answers
A population of n ????20 scores has a mean of???????? 15. one score in the population is changed from x ???? 8 to x ???? 28. wha
Dmitry_Shevchenko [17]

20 has been added to the total of scores, so the new mean for the 20 scores will be 20/20 = 1 higher than it was.

The new population mean is 15+1 = 16.

7 0
3 years ago
Need help please help
aleksandrvk [35]

okokok

Step-by-step explanation:

5 0
3 years ago
PLEASE HELP ME I DONT KNEO HOW TO DO IT
just olya [345]

You learn more from failure than from success. Don’t let it stop you. Failure builds character.

7 0
3 years ago
Please Help Waiting 2 hours due in 10 minutes<br> Will report if file
UNO [17]

Answer:

A

Step-by-step explanation:

We have to multiply it by two because they have us 2 numbers for the legs, we use the Pythagorean theorem thing, but we have to basically add them, or we can multiply y 2(since they are the same number). Anyways 18\sqrt{2} (2)= 36\sqrt{2}

8 0
3 years ago
Other questions:
  • there are 30 rooms available to house 42 students . if each room is occupied by either one or two students, how many rooms are o
    15·1 answer
  • Completely factor x^2+x-6
    14·1 answer
  • NEED HELP ASAP
    9·1 answer
  • Gabriela has taken 3 test and her average score is 85.If she earns 100 on her two remaining tests.What will her new average be?
    12·2 answers
  • What is 3a^9r^-3/-4a-2
    6·1 answer
  • What fraction is more than 0 but less than 4/10? Idk if I am even asking the question correctly!
    5·1 answer
  • ) What are the solutions of -1&lt;=x-3&lt;4 ?​
    10·1 answer
  • How many solutions does 6(4s+12)=8(3s-14) have?
    11·1 answer
  • Janet worked 3 hours more than David and 7 hours less than Kate. David earned $7.50 per hour, Janet earned $6 per hour, and Kate
    5·1 answer
  • What is the property name for <br> 27*3.14=3.14*27
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!