Please answer these equations of Zero and Negative Exponents

is the first on matrices?
except for 1, i'll solve in long hand. If the first one is matrices, you have to state what to do: simplify, co-matric, etc.
di ko po alam ano po b yang co-matric? wala namn po yan sa ni lesson ni mam :(


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Answers on Negative exponents:   
thank you po talaga! sayang offline ka na po mayroon pa sana akong limang problem :( number 9 10 at 11
you're welcome :-) Post them earlier next time.