Question

Please explain how to solve this question to me ​

Answer 1

Step-by-step explanation:

Economics is a social science concerned with the production, distribution, and consumption of goods and services. It studies how individuals, businesses, governments, and nations make choices about how to allocate resources. ... The building blocks of economics are the studies of labor and trade.

Answer 2

Step-by-step explanation:

$(3x + 4y) {}^{2} = 169 \\ (3x - 4y) {}^{2} + 48xy = 169 \\ 3x - 4y = \sqrt{169 - 48 = 121 = 11}$