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7171.Machine A can complete a job in 8 hours, and Machine B can complete the same job in 12 hours. If both machines work together, how many hours will they take to complete the job?
7172.A rectangular floor 18 feet x 10 feet is to be covered with carpeting that costs x Rs/Sq Yard. In terms of x how many Rupees will the carpeting cost?
7173.Ali's weekly salary was increased by 8% to $237.60. What was her weekly salary before the increase?
7174.Calculate the value of x in the equation: 12 - 5x = x + 30?
7175.If an athlete's weight decreases from 160 pounds to 152 pounds. what is the percentage decrease?
7176.Divide 3900 ÷ 500 = _____?
7177.Multiply 15,873 × 28 = _____?
7178.If 25% of a certain number is 1600, what is 10% of the number?
7179.Complete the series: 2, 4, 12, 48, 240, _____?
7180.Complete the series: 50, 60, 80, 110, 150, ________?