book Maths Puzzle Numerical Ability

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aX+b=c:solve for x

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book Other Question

8x^5-12x^4+38x^3-49x^2+24x-4
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Lower Bound (Greatest Negative Interger)
Consecutive Interger Intervals The diagonal of a rectangle is 10 inches and the area is 45 square inches. Find the dimension of the rectangle, correct to one decimal place.