## Algebra 1: Common Core (15th Edition)

Population at 1990 = X Population at 2000 = Y = 281,421,906 The increase in population from 1990 to 2020 is 13.2%: X + $\frac{132}{1000}$ $\times$ X = Y $\frac{1132}{1000}$ $\times$ X = Y = 281,421,906 Therefore, X = Y $\div$ 1.132 = 248,605,924