HELP?!?! A message has been encoded by multiplying the numeric values of the letters by the matrix E. The coded message is matrix C. To decode this, you need to multiply the coded message C by the inverse of the encoding matrix, E-1. Decode the message and write it in the box below.

Question

alyssajobug · Answer

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alyssajobug · Answer

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kainui · Answer

So, do you know how to find the inverse? If not, do you know how to find the determinant?

alyssajobug · Answer

no, neither, I used an online calculator but I dont know how to calculate it.

phi · Answer

see http://www.mathsisfun.com/algebra/matrix-inverse.html and scroll down to 2 x 2 matrix can you figure out how to invert your matrix ?

loser66 · Answer

for question b, the answer is B) 150 years. Let me know if you want to know how can I get it.