What is the greatest common factor of 35x^6 and 7x^2?

This is so hard and it’s for a test

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

Aski resort is charging $37.50 to rent a snowmobile for 5 hours. at this rate what will be the cost for a family of 5 to rent snowmobiles for 3 hours on the first day of their vacation and 4 hours for on the last day of their vacation