exam Maths Puzzle Numerical Ability

Subtract. Simplify, if possible.

3/5u^2-5u - 1/5u-5

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exam Other Question

How do you simplify rational expression, with negative variables and exponents?
-x^2 + 10x - 21/-3x^2 + 23x - 14 Thank you for any help on this one!! The price per person to rent a limousine for a prom varies inversely as the number of passengers. If 5 people rent the limousine, the cost is $70 each. How many people are renting the limousine when the cost per couple is $18.50?