What is the mode of the data set 7, 8, 2, 3, 9, 3, 7.

A: 2
B: 9
C: 3 and 7
D: 3

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y