1 year ago

Give the center and radius of a circle with the equation: (x+1)²+(y-2)²=100

Mathematics

1 answer:

Lunna [17]1 year ago

4 0

OPTION A is the correct answer

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Find the domain of f(x)=x-9/x squared-81

vagabundo [1.1K]

$f(x)=\dfrac{x-9}{x^2-81}\\\\\text{The domain:}\\\\x^2-81\neq0\qquad\text{add 81 to both sides}\\\\x^2\neq81\to x\neq\pm\sqrt{81}\\\\x\neq-9\ \wedge\ x\neq9\\\\Answer:\ \boxed{\text{All real numbers except -9 and 9}}\to\boxed{x\in\mathbb{R}-\{-9,\ 9\}}$

7 0

2 years ago

HELPPP PLEASE I NEED AN ANSWER

mina [271]

Answer:

Step-by-step explanation:

4 0

2 years ago

I will like to know how to solve this

Alexxandr [17]

This is a linear equation in x.

So you need to group like terms

$1 + 4x = - 5 + 7x$
Let us group the x terms on the Right Hand Side of the equation and the constant terms on the Left Hand Side.

$1 + 5 = 7x - 4x$
We can now simplify

$6 = 3x$
Now let us divide both sides by 3.

$\frac{6}{3} = \frac{3x}{3}$

This implies that

$2 = x$
or

$x = 2$
Let us our answer

$1 + 4(2) = - 5 + 7(2)$

$1 + 8 = - 5 + 14$
$9 = 9$
Good we are right

5 0

3 years ago

Read 2 more answers

The first one is it right or wrong?

gayaneshka [121]

The first one is wrong

(do you need help solving it?)

3 0

2 years ago

Hey!

Talja [164]

Answer:

x=4