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.
Express
in rectangular form.
A.
B.
C.
D.
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 56.13 N
B.
about 15.67 N
C.
about 1.09 N
D.
about 10.63 N
Hint
4.
Evaluate | 5 – 2
i
|.
A.
B.
21
C.
D.
29
Hint
5.
Another name for the absolute value of a complex number is the _______________.
A.
argument
B.
real part
C.
amplitude
D.
modulus
Hint