exam Maths Puzzle Numerical Ability

The Robinson family went to dinner. the bill came out to be $230 including a 17% tip. what was the total amount of $ due excluding the tip price?

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complete the square, and find the roots of the quadratic equation
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x2 + 16x = 0 Write a direct variation equation that has (3,11) as a solution. Then find y when x=12.