Simplify the expression. Assume that all variables are positive when they appear.4
+ 4
A. 28
B. 28x
C. 7
D. 4
Answer: A
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Determine which fractions are proper.
, 
, 
, 
, 
A. 
, 
, 
, 
B. 
, 
, 
, 
, 
C. 
, 
D. 
, 
, 
Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 3(cos 33° + i sin 33°), z2 = 6(cos 16° + i sin 16°)
A. 18(cos 49° + i sin 49°) B. 9(cos 168° + i sin 168°) C. 18(cos 17° + i sin 17°) D. 9(cos 49° + i sin 49°)
Solve the problem. Round to the nearest cent.
Mr. and Mrs. Jarmel have a combined taxable income of $416,658. Their W-2 form shows they have already paid $77,205. Calculate their tax refund or payment.
A. $35,924.30 refund B. $44,154.30 payment C. $43,941.64 refund D. $35,924.30 payment
Solve the problem.To measure the width of a river, a surveyor starts at point A on one bank and walks 74 feet down the river to point B. He then measures the angle ABC to be 
Estimate the width of the river to the nearest foot. See the figure below. 
A. 32 ft B. 154 ft C. 67 ft D. 35 ft