X + 2y - 3z = 11
2x + y + z = -1
x - 3y - z=-8

What is the value of the digit 1 in the number 13?

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

Ineed with number 6 , explain how to get 1978