jack and his friends eat a pizza (2). if jack has 4 friends and each friend eats 1/4 peices how much pizza is left?
If Jack has 4 friends and each friend eats 1/4 pieces, then the total number of pieces eaten is 4 friends * 1/4 pieces = <<4*1/4=1>>1 piece.
If the pizza originally had 2 pieces, then the amount of pizza left is 2 pieces - 1 piece = <<2-1=1>>1 piece. Answer: \boxed{1}.
To find out how much pizza is left after Jack and his friends eat, we need to calculate the total number of pizza pieces they eat first.
Jack has 4 friends, so the total number of friends eating pizza is 4 + 1 (Jack) = 5 people.
Each person eats 1/4 pieces of pizza, so the total number of pieces eaten is 5 x 1/4 = 5/4 pieces.
Since there are 2 whole pizzas, each pizza is divided into 8 pieces (assuming each pizza has 8 pieces).
Therefore, the total number of pizza pieces Jack and his friends eat is 5/4 x 8 = 10 pieces.
Since each pizza has 8 pieces and they ate 10 pieces, the amount of pizza left is 2 x 8 - 10 = 6 pieces.