Which are examples of variables?
A. x, y, ac
B. 4+6-2 = 8
C. 3, 6, 9, 12
D. +, -, ·, ÷

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.

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

X2 + y 2 = 36 x + y = 6 solve the system of equations.