Prove that the graphs of the equations 3x–y=–5 and –x+10y=21 and 11x+21y=31 intersect at the point P (–1, 2).

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

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?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.