Scientific notation of 48200

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)

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"