exam Maths Puzzle Numerical Ability

find the slope of a line that is perpendicular to the following lines.


y=-1/5x-7

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exam Other Question

Perform the indicated operations:
2√[48] + 7√[12] -√[27]
Help to simplify the following would be appreciated :

3i^3 + 5i - 3i^2 + the square root of -25 - 2