Help pls I rly need it

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

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

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