3 years ago

If AB is parallel to co and the slope of CD is-8, what is the slope of AB

Mathematics

1 answer:

Crazy boy [7]3 years ago

6 0

The slope is option C because parallel lines have the same slope.

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3 years ago

Derive the equation of the parabola with a focus at (0, −4) and a directrix of y = 4.

CaHeK987 [17]

Answer:

$y=-\frac{1}{16} x^2$

Step-by-step explanation:

Equation of parabola with focus at (0,-4) and directrix is $y=4$ .

We know that parabola is the locus of all the points such that the distance from fixed point on the parabola to fixed line directrix is the same.

The parabola is opening downwards.

Let any point on parabola is (x,y).

Distance from focus(0,-4) to (x,y) = $\sqrt{(x-0)^2+(y-(-4))^2}=|y-4|$

$\sqrt{(x-0)^2+(y-+4)^2}=|y-4|$

$(x-0)^2+(y+4)^2=(y-4)^2$

$(x)^2+(y+4)^2=(y-4)^2$

$x^2+(y^2+4y+4y+16)=y^2-4y-4y+16$

$x^2+y^2+8y+16=y^2-8y+16$

$x^2+16y^2=0$

$16y=-x^2$

$y=-\frac{1}{16} x^2$

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2 years ago

Beth is solving this equation: 1/x + 3= 3/x

Vitek1552 [10]

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Step-by-step explanation:

A is the correct answer

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2 years ago

Can someone simplify this equation and solve for x and y? (2x-5)+(y-1)+x=169

goldenfox [79]

Answer:

Answer

2x+3y=14,2x−3y=2

Adding :

2x+3y=14

2x−3y=2

__________

4x=16

x=4

∴xy=4×2

2×4+3y=14

8+3y=14

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y=2

Step-by-step explanation:

here you go

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3 years ago

Read 2 more answers

I need to know what X=

laila [671]

Answer:

Lol I learned about this today in class, but I couldnt pay attention cuz I started crying about something

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3 years ago