Mary buys a 10-meter spool of thread for sewing. she uses 210 centimeters. how much is left on the spool in centimeters?

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Which value of y will make the inequality y< -1 false?

Can someone me with this? i’m not sure what to put for my equations.