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3 years ago

Which of the following is the equation of a circle with a radius of 10 cm and center at (–3, 6)?

Mathematics

1 answer:

vlabodo [156]3 years ago

5 0

The equation of a circle is (x - h)² + (y - k)² = radius² where (h, k) is the ordered pair for the center.

(x - (- 3))² + (y - 6)² = 10²

(x + 3)² + (y - 6) = 100

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Two numbers multiply to be -7 and add to be -6. What are the numbers? Example; 2,3

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Let the two numbers be x and y.

Two numbers multiply to be -7 and add to be -6.

This can be written in equation as,

$xy=-7$ and

$x+y=-6$

Value of the two numbers:

Let us determine the value of the two numbers using substitution method.

Substituting $y=-6-x$ in the equation $xy=-7$ , we get;

$x(-6-x)=-7$

Simplifying, we get;

$-6x-x^2=-7$

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Thus, the values of x are x = 1,-7

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