F(x)=2x^2+8 and g(x)=x-3 what are their domains

2.5 milligrams is equivalent to how many grams

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1