Perform the indicated operation.
+ 
A. 
B. 
C. 
D. 
Answer: A
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Solve the equation.2a = -14
A. 1 B. 16 C. -16 D. -7
Solve the problem.The area of a circle of radius r is given by the polynomial ?r2, where ? is an irrational number. Use 3.14 as an approximation of ?, and find the area of a circle with radius 
A. 15.7 cm2 B. 78.5 cm2 C. 75 cm2 D. 31.4 cm2
Solve the system of equations by the substitution method.
A. (11, -1) B. (-1, 11) C. infinite number of solutions D. no solution
Form a valid conclusion, using all the statements for each argument. Give reasons. ? If you learn mathematics, then you are intelligent. If you are intelligent, then you understand politics. ?
A. If you learn mathematics, then you understand politics. (transitive) B. If you learn mathematics, then you understand politics. (indirect) C. If you don't learn mathematics, then you don't understand politics. (direct) D. If you don't learn mathematics, then you don't understand politics. (indirect) E. none of these