1.
Solve the equation 3
x
+
y
+ 2
i
= 12 +
x
i
-
y
i
for
x
and
y
, where
x
and
y
are real numbers.
A.
B.
C.
D.
Hint
2.
Find the absolute value of the complex number
.
A.
-2
B.
C.
1
D.
2
Hint
3.
The force on an object is represented by the complex number 8 + 7
i
, where the components are measured in newtons. What is the magnitude of the force?
A.
about 1.09 N
B.
about 10.63 N
C.
about 56.13 N
D.
about 15.67 N
Hint
4.
Express the complex number -9 – 4
i
in polar form.
A.
B.
C.
D.
Hint
5.
Express the number
in rectangular form.
A.
B.
C.
D.
Hint