exam Maths Puzzle Numerical Ability

Please help me with this question.

Simplify and evaluate

(x^3y^4z^0/5x^6y^8)^3

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exam Other Question

find the distance between the lines with the following equations

3x-y+4=0 and

3x-y=0 How would I solve this system by graphing, and what would be the coordinates?
3x + y = 6
3x = y = 0