The phrase "a number of supporting" is correct and usable in written English.
It can be used when referring to multiple items or elements that provide assistance or reinforcement to a main idea or argument.
Example: "In her presentation, she included a number of supporting documents to strengthen her case."
Alternatives: "several supporting" or "various supporting".
But a year and a number of supporting emails from myself later and Khushal was still in limbo.
A number of supporting algorithms for the assessment of data quality and security are presented and discussed.
The Directives are complex, and there are a number of supporting programmes set up by the European Commission to aid their implementation.
He began acting in the late 1940s after changing his professional name, playing a number of supporting roles in notable British films including An Inspector Calls and The Colditz Story.
McGowan's wife, Charlotte Page, takes on a number of supporting roles in the play, including that of a TV researcher who is verbally threatened by Savile after witnessing his abuse of a young girl in a backstage dressing room.
Gorée Island, off the Senegal coast, served as a major entrepôt for the Atlantic slave trade and has been restored as a historic site with a number of supporting museums.
As with the usual.NET runtime, with Silverlight you can code in a number of supported programming languages.
PIP is a a single sign in solution that supports both OpenID (you are issued a Verisign OpenID) and direct sign in to a number of supported websites.
When opening the app on any of a number of supported platforms, Netflix subscribers will be prompted to choose their profile.
The feature uses DLNA technology to connect with a number of supported connected TVs, Blu-ray players, game consoles, and other companion streaming devices.
With Gnip, developers can write once for the Gnip API and gain access to user data for a number of supported publishing services.
