Acoin is flipped four times. for each of the events described below, express the event as a set in roster notation. each outcome is written as a string of length 4 from {h, t}, such as hhth. assuming the coin is a fair coin, give the probability of each event. (a) the first and last flips come up heads.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

step-by-step explanation: