Find the difference 2x+5/x^2-3x - 3x+5/ ^3 -9x - x+1/x^2-9

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.

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?