Look for payments made / balance on document

Kim borrowed $400 from her parents to purchase a new cell phone the table represents Kim’s repayment schedule. Which inequality states the domain of the relation ?

A) D : ( 0 < x < 8 )

B) D : ( 0 < y < 8 )

C) D : ( 0 < x < 400 )

D) D : ( 0 < y < 400 )

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil