First condition: number of slides must be more than 3 times number of swings This means that: y > 3x
Second condition: each swing cost 275$ and each slide costs 168$. They cannot spend more than 1250$. This means that the sum of costs of swings and slides should not exceed 1250$ (should be less than or equal to 1250$) This means that: <span>275x+168y ≤ 1250
Based on this: The correct choices are: b and d</span>