3 years ago

Which is the center of a circle whose equation is x2+y2+4x-8y+11=0?

Mathematics

1 answer:

Nikolay [14]3 years ago

6 0

Answer:

Center (-2 , 4)

Step-by-step explanation:

x^2 + 4x + y^2 - 8y = - 11

(x^2 + 4x + (4/2)^2 + (y^2 - 8y + (8/2)^2 ) = - 11 + 4 + 16

(x + 2)^2 + (y - 4)^2 = 9

Center (-2, 4)

You might be interested in

the sales tax in Illinois is 6.25%. About how much will a pair of jeans that has a ticket price of $48.99 cost, including sales

Leno4ka [110]

$52.05 is the answer!

4 0

3 years ago

A woman paid $28 per a dress. She bought 6 dresses. How much money did the woman spend on dresses?

Tju [1.3M]

Answer:

$168

Step-by-step explanation:

28x6

= 168

4 0

3 years ago

Read 2 more answers

If g(x) is the inverse of f(x)=4x+12 and f(x)=, what is g(x)

Nitella [24]

Hello,
f(x)=y=4x+12

x=4y+12
==>4y=x-12
==>y=x/12- 3

g(x)=x/12 -3

6 0

3 years ago

Read 2 more answers

The level of the tide in a harbor changed from 9 1/4 ft to 4 1/2 ft above sea level over a period of 3 1/4 hr

kumpel [21]

Answer:

The answer is " $\bold{- \frac{19}{13} \ / hour}$ "

Step-by-step explanation:

Please find the complete question in the attached file.

Calculating the difference of $9 \frac{1}{4}\ and \ 4 \frac{1}{2}$ dividing the value by $3 \frac{1}{4}$

$\to 4 \frac{1}{2} - 9 \frac{1}{4}\\\\ \to \frac{9}{2} - \frac{37}{4}\\\\ \to \frac{18-37}{4} \\\\ \to -\frac{19}{4}\\\\\to -\frac{19}{4} \div \frac{13}{4}= -\frac{19}{4} \times \frac{4}{13} = -\frac{19}{13}\\$

3 0

3 years ago

If f(x) = -3x-5 and g(x)=4x-2, find (f-g)(x)

MA_775_DIABLO [31]

f(x) -g(x) = -3x-5 -(4x-2)

distribute

-3x-5 -4x+2

combine like terms

-7x-3

Answer:

-7x-3

6 0

3 years ago

Read 2 more answers