What substitution should be used to rewrite x8 – 3x4 + 2 = 0 as a quadratic equation? u = x2 u = x4 u = x8 u = x16?

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