Perform the indicated operation.Subtract.6x9 - 8x8 + 3x7 + 7
A. 10x9 - 12x8 - 3x7 + 11
B. 10x9 - 12x8 - 3x7 + 3
C. 2x9 - 12x8 - 3x7 + 3
D. 2x9 - 4x8 + 9x7 + 11
Answer: D
Mathematics
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A. 
B. 17.36
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Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x-7y7)-4z3
A. 
B. 
C. 
D. 
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Find A-1 without a calculator.A = 
A. A-1 = 
B. A-1 = 
C. A-1 = 
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