Find the smallest number θ larger than 4pi such that tanθ=1

Landon is entering the science fair. he has a budget of $115. he has spent 20 percent of the money on new materials. how much does landon have left to spend?

What is the common difference in the following arithmetic sequence 7,3,-1,-5

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?