Question is in the picture please solve

Which statement describes the term economics? a. it is the study of using limited resources to fulfill wants and needs. b. it is the study of how governments fulfill the wants and needs of nations. c. it is the study of how people spend their money to fulfill wants and needs.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41