What substitutions should be used to re write 4x^12 - 5x^6 - 14 = 0 as a quadratic equation

A25-inch wide drum is used in a marching band. what area does the top of the drum cover? round to the nearest hundredth. (use 3.14 for pi.)

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?