(10 POINTS PLUS ANOTHER 5!!)

I would really appreciate the help, please and thank you! <3 :)

Which expression shows the sum of the polynomials with like terms grouped together

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

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.