Simplify the expression:
23·(a^2n+1)^3·2a^5n−1

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?