Ask question

Ask question

All categories

murzikaleks [220]

3 years ago

11

HURRRY PLEASE. Find the focus and directrix of the parabola with the equation y2=18x

1 answer:

Lady_Fox [76]3 years ago

7 0

Been a while but I'm gonna try..! Okay!
For the Focus use the vertex to find it. (9/2 , 0)
For the directrix I believe it is. x = -9/2

You might be interested in

On a coordinate plane, a line goes through (0, negative 1) and (3, 1). A point is at (negative 3, 0).

nekit [7.7K]

Answer:

it the 2nd because it has the 2 in it

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Please help! #15 i know how to solve it i just dont know how to erite the equation out

zhuklara [117]

Here's 2 (almost) equations:
m<1 = m<3
m<1 + m<2 + m<2 + m<3 = 360

I got the first one because angle 1 and 3 are on opposite sides, so they must be equal. I got the second one because 2 and (unlisted) 4 must be equal, and all of the angles added must be 360.

5 0

3 years ago

Read 2 more answers

If the surface area of a sphere is 100π what is its volume in terms of π

xenn [34]

Repeated 6 after decimal. $166.6666666 \pi$

5 0

3 years ago

stich3 [128]

Answer:

1'/4

Step-by-step explanation:

perimeter of a triangle is a + b + c

15 = 5n+n+2n-6+1

15 = 8n - 5

15 - 5 = 8n

10 = 8n

n = 10/8

n = 1'/4

3 0

3 years ago

30. What is the solution to the system of equations? (1 point)

sesenic [268]

Answer:

Option B) (-1,7,5) is correct.

The solution to the given system of equation is (-1,7,5)

Step-by-step explanation:

Given system of equations are

$-7x-2y+z=-2\hfill (1)$

$6x-y-z=-18\hfill (2)$

$5x+4y-z=18\hfill (3)$

To find the solution of the given system of equations by using Elimination method:

Now adding equations (1) and (2)

$-7x-2y+z=-2$

$6x-y-z=-18$

_________________

$-x-3y=-20$

________________

$-x-3y=-20$

$-(x+3y)=-20$

$x+3y=20\hfill (4)$ (since "-" getting cancelled)

Now adding equations (1) and (3)

$-7x-2y+z=-2$

$5x+4y-z=18$

_________________

$-2x+2y=16$

________________

$-2x+2y=16$

$2(-x+y)=16$

$-x+y=8\hfill (5)$

Now adding equations (4) and (5)

$x+3y=20$

$-x+y=8$

_________________

$4y=28$

________________

$y=\frac{28}{4}$

Therefore y=7

Substituting y=7 in equation (4)

$x+3y=20$

$x+3(7)=20$

$x+21=20$

$x=20-21$

Therefore x=-1

Now substituting the values x=-1 and y=7 in equation (1) we get

$-7x-2y+z=-2$

$-7(-1)-2(7)+z=-2$

$7-14+z=-2$

$z=-2+7$

Therefore z=5

Therefore the solution to the given system of equation is (-1,7,5)

Therefore Option B) (-1,7,5) is correct.

8 0

3 years ago