Pls answer this thanks

If n-9 is an even number what are the next three consecutive intergers

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30