Is this right? I don't know ty

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Find the interior angle of a regular polygon which has 6 sides

How many zeros does this polynomial function, y=(x-8)(x+3)^2