I need help please help me I don’t understand

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

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

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83