exam Maths Puzzle Numerical Ability

evaluate:
sin(-pie/6)
thanks!
aloha!

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exam Other Question

express the domain of the function using interval notation:
f(x) = sq rt 2x(sq) + 11x - 6

i thought i knew how to do this but i keep getting it messed up.
Please help me! How many years will it take for Sheila (34 years old) to be half the age of David (54 years old)?