Must the difference between two rational numbers be a rational number. explain

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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?

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.