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3 years ago

Which of the following equations correctly represents a circle centered at the origin with a radius of 10?

1 answer:

5 0

We need only focus on the standard equation of a circle centered at the origin with radius r: x^2 + y^2 = r^2. Here, r = 10 and so r^2 = 100.

Thus, in this case, the equation of the circle is x^2 + y^2 = 10^2.

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Help me solve this problem please

BabaBlast [244]

Answer:

x=-10

Step-by-step explanation:

15-2(x+5)=25

multiply the 2 by the x and 5 and you get

15-2x-10=25

since the 15 and the negative 10 are on the same side you add them together and get

5 -2x= 25

-5 -5

-2x =20

Then divide the -2/20= -10

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3 years ago

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Answer: 8.5 Miles

Pythagorean Theorem

$a^{2}$ + $b^{2}$ = $c^{2}$

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3 years ago

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A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science bok. If 1/

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4 years ago

Picture below need answer fast

IRINA_888 [86]

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3 years ago

An administrator at UF wants to estimate the proportion of students who would support an increase in the student activity fee. T

Natalija [7]

Answer:

The correct answer is "664".

Step-by-step explanation:

The given values are:

Margin of error,

E = 5%

i.e.,

= 0.05

Level of confidence,

C = 99%

i.e.,

= 0.99

Level of significance,

α = 0.01

From the z value table,

Critical z = 2.576

As we know,

The required sample size n will be:

= $(\frac{z}{E} )^2\times p(1-p)$

On substituting the values, we get

= $(\frac{2.576}{0.05} )^2\times 0.5(1-0.5)$

= $(51.52)^2\times 0.25$

= $2,654.31\times 0.25$

= $663.5776$

i.e.,

= $664$

3 0

3 years ago