If x + y is rational, must x and y each be rational?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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

Tell whether the two rates form a proportion