exam Maths Puzzle Numerical Ability

Christina and Jelani are standing at the topof the leaning tower of Pisa in Italy, 185 feet above the ground. Jelani wonders what the path of a dropped object would be as it falls

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how do you work out an expression for a number? I need help finding the solution set and graph of the inequality x+5<6. The answer should be on a scale with circles that are filled in or not. i dont understand this question!