Is finding 9/10-1/2 the same as finding 9/10-1/4-1/4?

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.

The triangles are similar. what is the value of x? enter your answer in the box.

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)