exam Maths Puzzle Numerical Ability

Translate the linear equation 9x - 4y = 200 and 7x - 3y = 200 to a real-life situation

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4. If f and g are linear functions with graphs that are perpendicular, show that the slopes of the graphs of f-g and g-f are both -1. a playground is situated on a triangular plot of land. two sides of the plot are 175 feet long and they meet at an angle of 70 degrees. for safety reason, a fence is to be placed along the perimeter of the property. How much fencing material is needed?