Find the value of x.
X =

plz help !!

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c =

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )