Identify whether the given pairs of events in a roulett game are mutually exclusive. Drag the items on the left to the correct location on the right

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.

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?