Add or subtract as indicated. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
Answer: D
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Find a polar equation for the circle.x2 + (y - 6)2 = 36
A. r cos ? = -12 B. r = -12 sin ? C. r = 12 cos ? D. r = 12 sin ?
Convert. When necessary, round the answer to two decimal places.8.75 pounds = _____ ounces
A. 0.55 B. 122.5 C. 16 D. 140
Graph the system of inequalities. Shade the region that represents the solution set.y? 
x + y> -3
A. 
B. 
C. 
D. 
Match the story with the correct figure.Mark started out by walking up a hill for 5 minutes. For the next 5 minutes he walked down a steep hill to an elevation lower than his starting point. For the next 10 minutes he walked on level ground. For the next 10 minutes he walked uphill. Determine which graph of elevation above sea level versus time illustrates the story.
A. 
B. 
C.
D. 