work out momentum of each vehicle before the collision!
so say A is the car, A has momentum 32 x 1070
so B is the SUV, and has momentum -v x 2390 (- v because in opposite direction to A's velocity)
so the total momentum is (32 x 1070) - (v x 2390)
now work out momentum after collision
as they come to a hault, then the velocity is zero, and assuming they stay together, the the masses can be added.
so final momentum is 0 x 3460
now put into an equation, because of the conservation of momentum law
(32 x 1070) - (v x 2390) = 0 x 3460
so after calculation
v = 14.326 m/s