exam Maths Puzzle Numerical Ability

Perform the indicated operation.

x squared - 3x OVER 5x squared TIMES 10x OVER x squared - 4x + 3

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exam Other Question

factor by using the distributive law 7+7y please help!!!!!!!!!!!!
I do not understand what they are asking for. State whether the system is consistent and independent, consistent and dependent, or inconsistent; x+y=4 2x-y=-7