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s344n2d4d5 [400]
2 years ago
11

Dialtion, reduction or enlargment. Explain and show work. Homework is due today!!

Mathematics
1 answer:
marin [14]2 years ago
3 0

Answer:

A)Reduction

B)0.5

Step-by-step explanation:

A)It gets smaller

B)A-D=12

A'-d'=6

6/12=0.5

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Write the equation of the circle with center (-4, 8) and passes through the point (-2, -1)
anzhelika [568]

Answer:

(x+4)^2+(y-8)^2=85

Step-by-step explanation:

The standard equation for a circle is given by:

(x-h)^2+(y-k)^2=r^2

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We know that the center is (-4, 8). So, substitute -4 for h and 8 for k:

(x-(-4))^2+(y-8)^2=r^2\\

Simplify:

(x+4)^2+(y-8)^2=r^2

Now, we will need to find r.

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(-2+4)^2+(-1-8)^2=r^2

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(2)^2+(-9)^2=r^2

Square:

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Add:

r^2=85

So, r squared is 85.

We don’t actually have to solve for r itself, since we will have to square it anyways.

So, we have:

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Substituting 85 for r squared, we get:

(x+4)^2+(y-8)^2=85

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Step-by-step explanation:

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