Is y= xsquare+3x a quadratic function?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Me n o w. i need t h i s. 10 points

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