Which is the prime factorization of 81

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

It says factor each expression 49x-28?

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