just one argentinosaurus the pack of t-rex would simply just win
a t-rex would win because a t-rex is bigger than an elephant
With a pack that large, the Utahraptors have the upper hand. The utahraptors would have probably used a hunting strategy and distracted the T-Rex while the others attacked from the side. The Utahraptors may take a few casualties and probably would think twice about taking a T-Rex head on.
T rex
T. rex would win. Deinonychus was relatively small, small enough that a T. rex would be able to kill one in a single bite.
Well it all depends on the number of raptors in a pack. Generally a pack of anything, wolves for example, will consist of 5ish members. If one takes into account the height, weight, strength differences, then the T-Rex would be the obvious choice, however with its stubby arms, whose to say it would be able to reach the raptors at all. Winner: Evolution
t-rex would win because its much stronger and has the most powerful jaw
There is no doubt that the pack of pirahnas would win, they are more agressive and have larger teeth
sucho
I would win
The wolves would win easily but they may not be able to catch the greyhounds.
Nobody would win against a T-Rex because a T-Rex is larger and much stronger than both of them combined together. No! The ninja would join forces with the pirate, beat the Trex, then the ninja would kill the pirate!
Ben 10 would win because generater rex can use different kind of machines but ben 10 can turn into different aliens.