Simplify: 40 - 24÷ {7 + (7-15)}
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Which of the following represents the length of a diagonal of this trapezoid?

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