They have one purpose and will give their power and authority to the beast.
OJBThese are united in yielding their ko'ach (power) and samchut (authority) to the Chayyah (Anti-Moshiach).
RVThese have one mind, and they give their power and authority unto the beast.
TCENTThese kings have one mind and will give their power and authority to the beast.
T4TThose rulers will all agree to do the same thing. As a result they will give to the beast their power to rule people as well as their authority to rule people [DOU].