"The Threepenny Opera," a Threshold Stage Company production at Star Theatre, is part musical, part opera, and on opening weekend uneven, but promising. "Threepenny" was written in 1928 by Bertold Bre. Los Angeles City College empowers students from the diverse communities it serves to achieve their educational and career goals by providing learner-centered pathways to success through transfer, career and technical education, and foundational skills programs. The weighty musical values…