Please help!!!!!!!!!!!! i got the wrong answer

Question

A 130-kg tackler moving at 2.1 m/s meets head-on (and tackles) an 92-kg halfback moving at 5.3 m/s .

Part A What will be their mutual speed immediately after the collision? Express your answer using two significant figures

Answer 1

By Law of conservation of momentum: m₁v₁ - m₂v₂ = (m₁ + m₂)v; v = (130kg·2.1m/s - 92kg·5.3m/s)/(130kg + 92kg) = - 0.97 m/s