exam Maths Puzzle Numerical Ability

Simplify, if possible:

5(square root)18 - 6(square root)2

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exam Other Question

Car rental company has 2 rental rates. Rate one is $72 per day plus $0.18 per mile. Rate two is $144 per day plus $0.09 per mile. Write an inequality to show when rate two is less that rate one in terms of the number of miles (X). If the sides of a square are lengthened by 7 cm, the area becomes 144cm^2. Find the length of a side of the original square.

The length of a side of the original square is _____ cm.