Check each set that includes the number shown 5/9 natural numbers whole numbers integers rational numbers irrational numbers real numbers

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)