The phrase "a mixture of promises" is correct and usable in written English.
You can use it when describing a combination of different commitments or assurances made by someone or something.
Example: "The politician's speech was filled with a mixture of promises that appealed to various voter concerns."
Alternatives: "a blend of commitments" or "a combination of assurances".
It was able to extract concessions with a mixture of promises and threats.
Every other consideration was subordinated to this obligation, even to the point at which the Spanish ambassador in Rome, Gaspar de Guzmán y Pimental, conde-duque de Olivares, intervened in three successive conclaves in order to assure, by a mixture of promises and threats, the election of popes congenial to his master (conclaves in 1590 91 of Urban VII, Gregory XIV, and Innocent IX).
A corpse is a stark reminder that human beings are inescapably embodied creatures, and that a life is the sum of what has been performed and spoken by the body — a mixture of promises made and broken, deeds done and undone, joys evoked and pain inflicted.
If bipartisanship means enforcing total discipline in your own party and bludgeoning one or two Democrats to join your side with a mixture of promises and threats, Mr. Bush could still win as the Senate moves today toward adoption of a budget resolution.
The trial's results provide signals rather than definitive answers, and a mixture of both promise and unresolved challenges.
Napoleon, taking advantage of the situation, sent in General Joachim Murat to occupy Madrid and, by a mixture of threats and promises, induced both Charles and Ferdinand to proceed to Bayonne for conferences.
The word in Washington is that over this weekend the White House and Trent Lott, the Republican leader, are furiously pummeling the G.O.P. waverers with a mixture of threats and promises to increase budget spending in the senators' favored areas -- such as education for Mr. Jeffords -- all in order to give the president a signature victory this week.
Indonesian officials have reacted with a now-familiar mixture of promises, prevarications and angry nationalistic language.
BARACK OBAMA has been a frustrating presidential candidate, a strange mixture of promise and disappointment.
"I got leaned on for two hours with a mixture of pressure and false promises.
It was Wilhelm who persuaded Turkey into joining the first world war with a mixture of gold, blandishments and promises.
