Simplify.
+ 
A. 
x + 
B. 
x - 
C. 
x - 
D. 
x - 
Answer: B
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Perform the indicated operations graphically.(4 + j) + (3 - 2j )
A. 
a = 4 - j
b = 3 - 2j
c = (4 - j) + (3 - 2j )
B. 
a = 4 + j
b = 3 - 2j
c = (4 + j) + (3 - 2j )
C. 
a = 4 + j
b = 3 - 2j
c = (4 + j) + (3 - 2j )
D. 
a = 4 + j
b = 3 - 2j
c = (4 + j) + (3 - 2j )
Write the expression in terms of sines and/or cosines, and then simplify.sec2 x(1 + cos2 x)
A. 
B. sin x
C. 
D. 
Solve the problem.Derek is four times as old as Sarah. Three years ago the sum of their ages was 29. How old is each now?
A. Derek: 117 yr old; Sarah: 28 yr old B. Derek: 29 yr old; Sarah: 117 yr old C. Derek: 31 yr old; Sarah: 114 yr old D. Derek: 116 yr old; Sarah: 29 yr old
Suppose that in an assortment of 6 calculators, there are 3 with defective switches. Draw with and without replacement. If two machines are selected at random, what is the probability that both have defective switches? ?
A. with : 
, without : 
B. both : 
C. with : 
, without : 
D. both : 
E. none of these