margie bought 25 pounds of candy for her birthday party that cost her $14.25. about how much did she pay per pound?

Me because some of question i don’t understand

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x, and the distance in miles, y, that he travels.