Find the limit algebraically.
A. -9
B. 0
C. 9
D. 1
Answer: A
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Evaluate the expression.20 + (-12) - 19 - (-12)
A. 39 B. 1 C. -23 D. 15
If r is a positive number and the point (x, y) is in the indicated quadrant, decide whether the given ratio is positive or negative.I, 
A. Negative B. Positive
Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the water 12 degrees? (Round to the nearest foot.)
A. 6 ft B. 25 ft C. 62 ft D. 51 ft
Solve.A pizza restaurant advertises two specials. The first special is a 10-inch pizza for $13. The second special is two 6-inch pizzas for $12. Determine the better buy. (Hint: First compare the areas of the two specials and then find a price per square inch for both specials.)
A. 10-in. pizza B. The two specials are equivalent buys. C. two 6-in. pizzas