Could u help me with these 3 questions? Ill mark if its correct. :)

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10