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Mathematics
Mathematics
Problem
If the circle
x
2
+
y
2
+
4
x
+
22
y
+
c
=
0
x^2 + y^2 + 4x + 22y + c = 0
x
2
+
y
2
+
4
x
+
22
y
+
c
=
0
bisects the circumference of the circle
x
2
+
y
2
−
2
x
+
8
y
−
d
=
0
x^2 + y^2 - 2x + 8y - d = 0
x
2
+
y
2
−
2
x
+
8
y
−
d
=
0
, then
c
+
d
c + d
c
+
d
is equal to a. 40 b. 50 c. 60 d. 70
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