What is the value of 8 to the third power + 5x when x = 12

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?

Divide. write in simplest form 41/6 divided by 10

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?