Solve the quadratic equation: x^2 = -9

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.

What is the area of triangle abc if a = 8, b = 11, and c = 15?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41