Thirty-five percent of the profit went to charity. If $19,500 did not go to charity, what was the total profit?

4+6x-3x^3 in standard form with explanations because i don’t understand

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Factor the expression using gcf 9b+45