Which expression is equivalent to −1/2(3−2/5)?

Answer 1

probably you mean minus one half of (three minus two-fifths) =(-1/2)(13/5) = -13/10 =- 1.3

but the way it's written it technically means -1 divided by (2(3-2/5) = -1/26/5 = -5/26

Odds are you want the -1.3 solution