Which would be considered part of an employee’s salary?

What is the solution of the systems of equations? y=2/3x+3 x=-2

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)