Simplify, then write in descending order.4a6 - 4a6 + 3a5 + 5a + 2a6 - 12a5 + 6a
A. -7a6 + 11a
B. 2a6 - 9a5 + 11a
C. -7a11 + 11a
D. 2a6 + 9a5 + 11a
Answer: B
Mathematics
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Write the statement as an inequality.z is less than or equal to 8
A. z ? 8 B. z = 8 C. z < 8 D. z > 8
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Determine the area of the triangle. If necessary, round the answer to two decimal places. 
A. 9.23 B. 12.69 C. 18.47 D. 4.62
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Simplify the given expression using the definition for negative exponents. Assume that all variables represent nonzero numbers.
A. a16 B. a97 C. a2 D. 97
Mathematics
Solve the equation.
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A. 
B. 
C. 
D. 
E. 
Mathematics