ANSWER:
B. System of nonlinear equations
STEP-BY-STEP EXPLANATION:
We have the following system of equations:
[tex]\begin{gathered} x^2+y^2=9 \\ \\ \frac{x^2}{16}+\frac{y^2}{9}=1 \end{gathered}[/tex]
We can see that they are equations and not inequalities, that the degree of each equation is two, that is, they are quadratic equations, they are not linear but non-linear.
This means that the correct answer is B. System of nonlinear equations
