Please help me out real fast!

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

How do you solve a question like this?

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.