Combine the like terms to simplify the expression:
9 + 3 + 17xy2 + 8y3 + 10x –13xy2 – 9x – 6y3
a. 2y6 + 4x2y2 + 10x + 12
b. 2y3 – 4xy2 – 3x + 12
c. 2y3 + 4xy2 + 10x + 9
d. 2y3 + 4xy2 + x + 12

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.