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Harman [31]
3 years ago
13

A circle has a center at (4, -7) and a radius of 4 units. What is the equation of this circle?

Mathematics
1 answer:
Softa [21]3 years ago
7 0

Answer:

(x-4)^2+(y+7)^2=16

Step-by-step explanation:

A circle with radius r and centre (a, b) has an equation:

(x-a)^2+(y-b)^2=r^2

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IgorC [24]

Hello!

Let's write some important information contained in the exercise:

• hotdogs: $2.59 (,x,)

,

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He spent a total of $39.29. We can write it as:

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Now, let's solve these two equations as a linear system:

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First, let's isolate x in equation A:

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Now, we will replace where's x by 11-y in equation B:

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As I called the hamburgers as 'y', we know that he bought 4 packages of hamburgers.

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