The phrase "act with determination" is correct and usable in written English.
You can use it to encourage someone to pursue their goals or tasks with a strong sense of purpose and resolve.
Example: "In order to achieve your dreams, you must act with determination and never give up."
Alternatives: "proceed with resolve" or "move forward with conviction."
The new government would act "with determination" to stop rocket fire by militants in Gaza.
"Jews must be able to defend themselves, by themselves, and to act with determination, against any enemy that tries to harm us," he told the schoolchildren.
Given these recent Israeli strikes and Israel's vows to act "with determination" to achieve its goals, the escalation of rhetorical threats against Israel was probably unavoidable.
"We must act with determination for strong and lasting growth"; and "we must act urgently" to combat unemployment and "reinforce our social cohesion".
"If we and the Palestinians act with determination," he said, "there is a chance that we can achieve real accomplishments, perhaps even before the end of President Bush's term in office".
"What happened today is again a tragic event which requires us all to unite to act with determination against terror," Mr. Sharon said, adding that "the condition for peace negotiations is an end to terror and violence".
But this was rejected by the prosecutor, Sandip Patel, who told Southwark crown court in London: "He acted with determination and undoubted ingenuity and it was sophisticated, it was calculating.
"Nisman, a courageous, venerable jurist who fought intrepidly for justice, acted with determination to expose the identities of the terrorists and their dispatchers," the ministry said in a statement.
And while we have been handed this nasty climate catastrophe from previous generations, we also come from a people that have proven themselves time and again to rise to the challenges of their times, to act with purpose, creativity, and determination.
"I want to act now with determination and, I would say, with enthusiasm," Mr Chirac said in the interview.
It is going to be a tough balancing act, but with determination, you can surely steel your heart.
