Suppose x + y = 13 and the value of x increases by 4. if their sim remain the same, what must happen to the value of y?

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

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?

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.