Anyone know this and can help

When a formula is solved for a particular variable, several different equivalent forms may be possible. if we solved a=1/2bh for h, one possible correct answer is h=2a/b . which one of the following is not equivalent to this? a. h= 2(a/b) b. h= 2a(1/b) c. h= a/1/2b d. h= 1/2a/b

What statement is true? 2x^2-9x+2=-1

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =