Please help me with RSM questions!
Simplify:

(−2)∙(2a−b)+3(a+b)

(−5)∙(a−2b+3c−4d)−(−3)∙(4a−3b+2c−d)

I'm giving 50 points if you answer correct!

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

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