Algebra part A B C and D

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.

How many $20 bills do you need to have to make $280

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu