Perform the operation indicated, then place the answer in the proper location on the grid. Write your answer in descending powers of X. What must be added to 3x -7 to make x² + 4x-12?

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2