1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jolli1 [7]
2 years ago
7

What is the radius of a circle given by equation x^2 + y^2 - 2x + 8y - 47 = 0

Mathematics
2 answers:
Lera25 [3.4K]2 years ago
7 0
X^2 + y^2 - 2x + 8y - 47 = 0
x^2 + y^2 - 2x + 8y = 47
(x^2 - 2x) + (y^2 + 8y) = 47
(x^2 - 2(1)x) + (y^2 + 2(4)y) = 47
(x^2 - 2(1)x + 1^2) + (y^2 + 2(4)y + 4^2) = 47 + 1^2 + 4^2
(x - 1)^2 + (y + 4)^2 = 64 = 8^2
r=8
tresset_1 [31]2 years ago
3 0

Answer:8

Step-by-step explanation:

You might be interested in
Help me ASAP.<br><br> What function is graphed below?
Delvig [45]

Answer:

Your answer is C. Hope this helps you! :)

5 0
2 years ago
If f(x)=x^2+9x and g(x)=1/x, find f(g(-1)).
shtirl [24]

Answer:

x=3

Step-by-step explanation:

x^2-9

bcos g(-1)=-1

f(g)=x^2+9(-1)=0

x^2-9=0

x^2=9

x=√9

x=3

8 0
2 years ago
Read 2 more answers
Ustin weighs 15 pounds less than Greg weighs. Half of Greg's weight is 75 pounds less than Justin's weight. How much does each o
Leto [7]

The answer to this question is A

5 0
3 years ago
There were 7,500 tickets sold for a concert, 20% of which were general admission. How many general tickets were sold?
konstantin123 [22]

7,500*20%=g

7,500*.20=g

1500=g

1,500 general admission tickets were sold.

5 0
2 years ago
The slope of a line is –2 and its y-intercept is (0, 3). What is the equation of the line that is parallel to the first line and
Doss [256]

Answer:

The answer is A) 2x + y  = 6

Step-by-step explanation:

Since the first line has a slope of -2, we know that the second does as well. We know this because parallel lines have the same slope. Now we can use that slope along with the point in point-slope form to get the equation.

y - y1 = m(x - x1)

y - 2 = -2(x - 2)

y - 2 = -2x + 4

y = -2x + 6

In this case, to find an equation that is similar, we could put it into standard for.

y = -2x + 6

2x + y = 6

This is answer A

4 0
3 years ago
Other questions:
  • Please help solve <br> 5!3!/6! = ?
    9·2 answers
  • Please help me<br> in the figure, m m
    10·1 answer
  • What is the range of the graph below?
    6·2 answers
  • The rate of the jet stream is 100 miles per hour. Traveling with the jet​ stream, an airplane can fly 1200 miles in the same amo
    5·1 answer
  • 15 in
    6·2 answers
  • Rewrite the division problem as multiplication:
    7·1 answer
  • Are the expressions 3(x + y) + 2y + 10 and x + 5y + 2(x + 5) equivalent?<br><br> PLEASE HURRY
    11·1 answer
  • Write the equation of the line that passes through the points (7, –9)
    11·1 answer
  • 2.(08.01 MC)
    10·1 answer
  • The width of a rectangle is 2x yards. The length of the rectangle is 7 yards more than the width.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!