Match each equation with the step that could be used to find each solution (math) Please !

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Graph the function =gx+2x3 and give its domain and range using interval notation.

When a number is decreased by 7%,the result is 74. what is the original number to the nearest tenth