Find the center and radius of x^2+y^2=9

2 answers:

7 0

$(x-x_1)^2+(y-y_1)^2=r^2\\
\text{center}=(x_1,y_1)\\\\
x^2+y^2=9\\
(x-0)^2+(y-0)^2=9\\
\text{center}=(0,0)\\
r=\sqrt9=3
$

riadik2000 [5.3K]3 years ago

6 0

$x^2+y^2=9\Leftrightarrow (x-0)^2+(y-0)^2=3^2$ hence the center is (0,0) and the radius is 3

You might be interested in

According to the document Current Population Survey, published by the U.S. Census Bureau, 30.4% of U.S. adults 25 years old or o

Marizza181 [45]

Answer:

0.0803 = 8.03% probability that the number who have a high school degree as their highest educational level is exactly 32.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they have a high school degree as their highest educational level, or they do not. The probability of an adult having it is independent of any other adult. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

30.4% of U.S. adults 25 years old or older have a high school degree as their highest educational level.

This means that $p = 0.304$

100 such adults

This means that $n = 100$

Determine the probability that the number who have a high school degree as their highest educational level is a. Exactly 32

This is P(X = 32).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 32) = C_{100,32}.(0.304)^{32}.(0.696)^{68} = 0.0803$

0.0803 = 8.03% probability that the number who have a high school degree as their highest educational level is exactly 32.

7 0

3 years ago

A boat cruise is 32 miles long. There are 40 sight-seeing stops evenly spread throughout the cruise. The boat covered 13 of the

Sauron [17]

For the first question, divide 32 by 40 and it should equal .8 miles. Then, for the second question, multiply .8 by 13 and it should equal 10.4 miles.

3 0

3 years ago

Find the output for each input of y = -2x.

VashaNatasha [74]

The 2nd choice down in correct.

4 0

3 years ago

Read 2 more answers

Concept of Function - Quiz - Level H

Hatshy [7]

Answer:

Step-by-step explanation: