Perform the indicated operation. Simplify if possible.
- 10x
A. 
B. 
C. 
D. 
Answer: D
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Because of a heavy spring runoff, the shoreline of a lake increased from 10.0 miles to 13.8 miles. What was the percent of increase in the shoreline?__________ %
Fill in the blank(s) with the appropriate word(s).
An airplane leaves New York and flies south at a constant speed to Miami, where it lands and takes on new passengers. It then makes the return flight at a constant speed. The graph of distance north of Miami is shown. Make a graph of velocity for the round-trip. Be sure to label your graph appropriately.
?
?
What will be an ideal response?
Fill in the blank with one of the words or phrases listed below.
A(n) 
of a system of two equations in two variables is an ordered pair of numbers that is a solution of both equations in the system.
A. solution B. substitution C. dependent D. consistent
Solve using a calculator, finding all solutions in [0, 2?). Round to the nearest hundredth.sin 4x + sin 2x = - 2cos x
A. 0.86, 1.57, 2.28, 4.71 B. 3.67, 5.76 C. 0.52, 1.57, 2.62, 4.71 D. 1.57, 3.67, 4.71, 5.76