Perform the indicated operations and simplify. Assume that all variables represent positive real numbers.5
+ 
A. 5
B. 12
C. 12
D. Cannot be simplified
Answer: D
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Which combinatorial reasoning error did Batanero et al (1997) find to be the most prevalent among the choices listed below?
a. Changing the problem from one type to another and misinterpreting the meanings of words in a problem b. Thinking that order matters in cases where it does not (and vice versa) c. Thinking that identical objects are distinguishable (or vice versa) d. Using unsystematic strategies for listing the possible combinations for a situation.
Solve the problem. Use 3.14 for ?. Round your answer to the nearest hundredth.A one-story building is 190 ft by 340 ft. If a square patio with sides 27 ft occupies the center of the building, how much area remains for offices?
A. 1033 ft2 B. 1060 ft2 C. 952 ft2 D. 63,871 ft2
Find the indicated sum.
A. 4940 B. 4807 C. 4522 D. 4636
Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.csc 540°
A. 2
B. 
C. 1
D. undefined