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3 years ago

Answer 7 and 8 2 questions for brainliest answers UGRENT HELP NOW!!!!!

Mathematics

2 answers:

hjlf3 years ago

8 0

The answer to 7 is 4 and the answer to 8 is 2.7

Luba_88 [7]3 years ago

4 0

7. answers is 4
8. the answer is 2.7 ........can i get brainliest? please?

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3 years ago

Write an equation of a circle that has the center at the origin and goes through (-3,-6)

dexar [7]

Answer:

$x^{2} +y^{2} = 45$

Step-by-step explanation:

General Equation of circle is

$(x-x_1)^{2} +(y-y_1)^{2} = r^{2}$ ----------- (1)

Here

$(x_1, y_1)= (0, 0)$

Radius r is distance from origin (x1, y1) to point (x2, y2)=(-3, -6)

$r=\sqrt{(x_2-x_1)^{2} + (y_2-y_1)^{2} }$

$r= \sqrt{(-3-0)^{2} + (-6-0)^{2} }$

$r= \sqrt{9+36}$

$r=\sqrt{45}$

Substituting values in equation (1)

$(x-0)^{2} +(y-0)^{2} =( \sqrt{45})^{2}$

$x^{2} +y^{2} = 45$

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3 years ago

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kykrilka [37]

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3 years ago

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Nesterboy [21]

The answer is C.

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