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Expand (x+3y)^7 x7+21x6y+189x5y2+945x4y3+2835x3y4+5103x2y5+5103xy6+2187y7 Am well aware this is the final answer. What exactly are the steps to getting it?

Beyond confused for this particular problem. Did not learn the full lesson. Please need serious help.

A surveyfinds that 110 people ate breakfast and 30 people skipped breakfast. Of thosewho ate breakfast, 10 people felt tired. Of those who skipped breakfast, 10people felt tired. Make a two way table that shows theconditional frequencies based on breakfast total. (Make sure you have the“joint”...