Which equation exemplifies the associative property of addition? 8+2=2+8 4+(2+1) = (4+2)+1 4+5=1+8 9(5•6)=(9•5)6

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!