exam Maths Puzzle Numerical Ability

how do you find the complement and the supplement for an angle that has degrees and seconds, and also a whole number?

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exam Other Question

Write the equation of a line that passes through (-5,0)?

Thanks in advance for your help!!
I hope this time the problem is more clear. Thanks for your help!

5a^2-20 (a^3+2a^2) (9a^3+6a^2)
_______ / ______ * _______

3a^2-12a (2a^2-8a)