Solve f(x) = x2 + x2 - 4x - 4 = 0

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

How many $20 bills do you need to have to make $280

Solve 2^x=32 and rewrite this equation in a logarithmic form