exam Maths Puzzle Numerical Ability

Given f(x)=5x+7 and g(x)= x squared +2, find (g x x) (x).

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exam Other Question

The revenue for a sandwich shop is directly proportional to its advertising budget. When the owner spent $2000. If the revenue is now $180,000, how much is the owner spending on advertising? A rectangle has a area of X^3-6X^2+15X-28 square feet. Its width is X-4 feet. What is its length?