Pleaase need ! add the polynomial expression find each sum vertically (y^2 - x^4) + (x^4 - x^2)

What expression is equivalent to (84+16)

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)