Final answer:
In 2014-2015, the three main sources of Texas State Revenues were taxes at 39%, federal support at 25%, and service charges at 15%.
Step-by-step explanation:
The three sources of Texas State Revenues in 2014-2015 were taxes, federal support, and service charges. Specifically, 39 percent of revenue came from taxes, while 25 percent consisted of federal support. The third source was revenue from service charges, which accounted for 15 percent. Among the taxes, sales tax was significant, making up 47 percent of the total tax revenue, while individual income taxes represented approximately 38 percent.