Geometry math question no guessing and show work

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Answer this question only if you know the answer! 30 points and

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato