Enter a value to balance the hanger

Write a story that matches with the expression 42x-5 pls hurry

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2

What are the triple angle formulas? is it related to double angle identities?