Pls help pls
which of this clues helps you understand what (band) means

What is the inverse of the function f(x) = 2x + 1?

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

2x minus y equals 6, x plus y equals negative 3