Follow the process of completing the square to solve 2x2 + 8x - 12 = 0. after adding b2 to both sides of the equation in step 4, what is the constant on the right side of the equation?

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.