(AP) - The Nevada State Education Association has enough signatures to force the state Legislature to consider a business tax increase to fund public schools.The secretary of state's office ruled Friday the teachers union collected nearly 107,300 valid signatures for its 2 percent business profits tax petition. The Las Vegas Review-Journal reports that's well more than the required 72,000.The state Supreme Court still must decide whether a 200-word petition description signed by registered voters sufficiently explains the $800 million-a-year tax measure. Justices heard arguments Wednesday.If they OK it, the proposal will be one of the most controversial items before the …