exam Maths Puzzle Numerical Ability

3u^2+2u+2u^-2?.......how do you solve this?

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exam Other Question

Evaluate the expression for the given value of the variable.
2
3x - 6x +9

x=-2 ii. You participate in a triathlon in which you swam 3 miles, ran 5 miles, and then bicycled 10 miles. You ran twice as fast as you swam, and cycled three times as fast as you swam. If your total time was 1 hr and 46 minutes, how fast did you swim?