Find the equivalent expression of 6^-7

What is the prime factorization of 195

What are the solutions to the equation 4x2+3x=24-x

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?