Question 21 of 25 Which expression is not a polynomial?
O A. 5x2 + 4x + 1
O B. x2 - x-12/X +3
C. 4- 3x + 5x5
D. 8x10 + 2x5

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

7+(3n++8) what is the answer to this?