Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.8 times a number added to -6, added to 7 times the sum of 5 times the number 
A. 7(5x + 6) + [8x + (-6)]; 43x + 36
B. 8(-6 + x) + 7(5 + 6x); 14x - 13
C. 8x - 6 + 7(5 + 6x); 50x + 43
D. 8(-6 + x) + 7(5x + 6); 43x - 42
Answer: A
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B. 
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Find the domain of the rational function.
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B. 
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E. 
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Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix B for which A + B represents the entire picture becoming one shade lighter.
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A. 35 and 37 B. 36 and 36 C. 30 and 42 D. 26 and 46