Justify each step used to simplify the expression.

1. 3x+2y-2x+3=3x-2x+2y+2
2. =(3x-2x)+2y+2
3. =(3-2)x+2y+2
4. =x+2y+2

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

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?