Simplify the exponential expression.(-7)3
A. -21
B. 343
C. -2187
D. -343
Answer: D
Mathematics
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Perform the indicated operations and write the answer in the form 
where a and b are real numbers.(6 + 3i) - (-9 + i)
A. -15 - 2i B. 15 + 2i C. 15 - 2i D. -3 + 4i
Mathematics
If the perimeter of ?ABC is 24 cm, find the length of each side.
Mathematics
Solve the inequality and express the solution set in interval notation. Graph the solution set on the real number line.6 - 2(2 - x) ? 14
A. (-?, 7]
B. (-?, 6)
C. (-?, 6]
D. [6, ?)
Mathematics
Evaluate the expression.4411/2
A. 42 B. 84 C. 10.5 D. 21
Mathematics