exam Maths Puzzle Numerical Ability

A manufacturer finds that the total cost C for a product is expressed by C=250x2-24,000, and the total revenue R at a price of $200 per unit to be R=200x-1,000, where x the number

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exam Other Question
Show how a test point for the inequality 3x+y >= 6 tells which side will be shaded. (Show the test point results and explain what that means) what is the slope of the line whose equation is 3x-4y-16=0