Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
The equation
x
2
+
y
2
−
4
x
+
6
y
+
k
=
0
x^2 + y^2 - 4x + 6y + k = 0
x
2
+
y
2
−
4
x
+
6
y
+
k
=
0
represents a circle of radius
5
5
5
. What is the value of
k
k
k
? a)
8
8
8
b)
−
12
-12
−
12
c)
12
12
12
d)
−
8
-8
−
8
Browse the problem library