Does anyone know the answer?

3. find the radius of circle p.4. find y.

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)