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vampirchik [111]
3 years ago
8

Solve the following equation for x. x2 + 8x + 7 = 0

Mathematics
1 answer:
igomit [66]3 years ago
7 0

Step-by-step explanation:

x² + 8x + 7 = 0

(x + 7) (x + 1) = 0

x = -7 or -1

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A circle has an equation (x+2)2+(y−5)2=64. What is 34 of its area.
skad [1K]

Answer:

3/4 of the area of the circle is of 48\pi squared units.

Step-by-step explanation:

Equation of a circle:

The equation of a circle has the following format:

(x - x_0)^2 + (y - y_0)^2 = r^2

In which the center is (x_0,y_0) and r is the radius.

Area of a circle:

The area of a circle of radius r is given by:

A = \pi r^2

Circle (x+2)² + (y-5)² = 64

Comparing with the standard equation, we have that:

r^2 = 64

Area of the circle:

A = \pi r^2 = 64\pi

What is 3/4 of its area?

\frac{3A}{4} = \frac{3*64\pi}{4} = 3*16\pi = 48\pi

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3 years ago
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miss Akunina [59]

Answer:

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Step-by-step explanation:

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vodka [1.7K]

Answer:

B

Step-by-step explanation:

Hey There!

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Step-by-step explanation:

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