3 years ago

4a. If (11+x) is positive, but (4+x) is negative, what is one number that x could be?

Mathematics

1 answer:

sattari [20]3 years ago

8 0

Answer:

Step-by-step explanation:

x has to be equal to or less than a -5 to get (4 + x) to be a negative number.

x has to be equal to or greater than -10 for (11 + x) to be a positive number.

Therefore, any number between -10 and -5 will work.

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What is the equation of a circle that has a center at (-4, 10) and a radius of 8?

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Answer:

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

Step-by-step explanation:

Equation of a circle:

The equation of a circle with center $(x_0,y_0)$ and radius r is given by:

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

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This means that $x_0 = -4, y_0 = 10$ .

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This means that $r = 8$ . So

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

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