These tables of ordered pairs represent some points on the graphs of lines s and t.
Which system of equations is represented by lines s and t?
52 - 2y = -15
7x + 4y = 20
x + 4y = -8
9x – y= 21
3x + 5y = –18
5x – 9y = 25
2x - y = –14
2x + y = 6

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account