What is the result when 16x + 9 is subtracted from 4x + 6

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

What is the measure of angle x? answer