What is the ratio for two squares of chocolate for 1/8​

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

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.