The answer will depend on the size of the bricks!
If the bricks are in feet then 51/2 bricks would be needed.
450 bricks
About 14 bricks should do it.
115 should do it!
1,350 of them.
1333.3
38
Gee, a square foot is 12x12, difficult problem.
Assuming the 12x12 bricks are 12 feet on each side, those are 144 square feet. The patio itself is 76 square feet. Unless you made a typo, not even one of those bricks is going to fit on the patio; you end up with about 0.5278 bricks.
A lot !!
It depends on the dimensions used for the measurements of the bricks. If the bricks are 6 ft x 9 ft (and there is nothing in the question to indicate otherwise), then 6 bricks will be enough.
432 x 12 inch x 12 inch bricks for an area 18 feet x 24 feet