How many solutions does this system have? 2 x minus 4 y = 8. x + y = 7.

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

Math i have no idea how to do a and b

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?