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Alexeev081 [22]
3 years ago
5

Multiply. Write your answer as a mixed number in simplest form.

Mathematics
1 answer:
dem82 [27]3 years ago
7 0

Answer:

39/30 = 1 9/30

Step-by-step explanation:

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Calvin encoded a secret phrase using matrix multiplication. Using A = 1, B = 2, C = 3, and so on, he multiplied the clear text c
Vlad1618 [11]
Our matrix C is the encoder.  Let X be our secret message and let B be our encoded message.  Therefore the relationship between the 3 can be represented as:

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So we want to solve for X (our secret message). So using matrix algebra:

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where C^-1 is the inverse of C.

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X = | 20 8 5 3 15 12 15 |
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We decode our message and it says:

X = | T H E C O L O |
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