Five times the quotient of some number and ten

Which value of c would make he following expression completely factored? 8x+cy

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is