Do the following, i mean like... its not THAT HARD

Factor this polynomial completely x^2-64

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}