exam Maths Puzzle Numerical Ability

If it takes 5 people 7 hours to clean an office building, how long would it take 4 people to clean the same building.

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exam Other Question

Butler County recorded 8 3/4 inches of rain during the past 5 months.

If this trend continues, how many inches of rain will fall in the next 2 months? can you please help me solve this:Ax+By=-28 contains the points (-8,4)(-11,9)