Ineed ! asap can someoneme solve 6 and 7!

Answer question above and explain each step : )

Find the value of the variable and the length of each secant segment.

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 = f