exam Maths Puzzle Numerical Ability

simplify: 3 square roots of(2/7) - 5 square roots of(7/2) + 3 square roots of 56.

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exam Other Question

find te area of the triangular region enclosed by the y-axix and the graphs of 6x+5y=30 and 2x-y=2. Can someone help me here?

I need to solve the system by addition or substitution

3x - 4y = 8
6x - 2y = 10

Thanks,
Jamie