Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = 6
B. x = 0
C. x = -6
D. none
Answer: C
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Use the guidelines to evaluate the study. Discuss flaws that you see in the study. An educational researcher wishes to compare the effectiveness of two different math textbooks. She has the tenth graders at one school use the first book for one year and the tenth graders at another school use the second textbook for one year. At the end of the year, she gives the same math test to both classes and compares the results.
What will be an ideal response?
Divide. 
A. 0.08275 B. 8.275 C. 0.8275 D. 0.00008275
Write the number without exponents.8.441 × 10-5
A. 0.00008441 B. 0.0008441 C. -844,100 D. 0.000008441
Write the expression with positive exponents only. Then simplify, if possible.-2-4
A. - 
B. 16
C. 
D. -16