On tuesday jack bought four boxes. on wednesday half of all the boxes that he had were destroyed. write an expression for how many boxes jack has now.
a. 12b+4
b. 12+4b
c. 4b−12b
d. b+42/2

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?