exam Maths Puzzle Numerical Ability

Perform Indicated Operation
(5x^2-7x+2)-(3x^2-4x-7)

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exam Other Question

Show that the number is rational by writing it as a quotinent of two intergers.

3. -1 1/3

Any help with this equation would be <b>greatly</b> appreciated. A boy and a girl work together to type a thesis and it takes them 6 hours. It would take the girl 5 hours more than the boy to type the thesis alone. How long would each need to type the thesis alone?