exam Maths Puzzle Numerical Ability

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!

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exam Other Question

The bottom of a 25 ft. ladder is placed 7 ft. from a wall. How far up the wall will the ladder reach?

2. A path leads across the park from one corner to the opposite corner. evaluate:
sin(-pie/6)
thanks!
aloha!