What is the GCF of the expression 4(x + y)z - 2(x - y)z?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

John checked his watch and said that it is thursday, 7 am. what will the day and time be 2006 hours plzzz i will give you 100 points