Find the Solutions to the linear systems
a)

x + y + z + w = 1
x + 2y − z + w = 0

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?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

A6 ounce bottle of dressing costs $1.56 a 14 ounce bottle costs $3.36 a 20 ounce bottle costs $5.60 which has the lowest cost per ounce