Collect like terms and then arrange in descending order.4x7 + 9x9 - 4x8 + 9x7 + 9x8 + 2x9

A. 11x9 + 5x8 + 13x7
B. 12x9 + 12x8 + 11x7
C. 29x48 
D. 11x18 + 5x16 + 13x14 

Answer: A

Mathematics

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