Which does NOT show a reasonable estimate for 673 × 18? A. 14,000
B. 13,500
C. 13,000
D. 10,000

Don't know how to find x given these segment lengths

Asap! i'm not good math and i'm lost.

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