What fraction in simplest form is equivalent to 0.45

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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

3x = 729 solve for x plz . it's urgent. will mark