Answer:
you just need to devide by 2 the second equation
Step-by-step explanation:
=> x + 2y =16
we can devide or multiply in an equation by any number we want, as long as we do it to every term.
Answer: 21
k(x) =x^3-2x
k(3) =3^3-2*(3)
k(3) =27-6
k(3) = 21
quadrant 1
