$138000 with a 15% discount. im seeing $20700 and $117300?​

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid