Someone please help!

What are the possible rational zeros of [tex]f(x) = x^4+2x^3-3x^2-4x+18[/tex]

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left