Find the 60th term of the arithmetic sequence -10,8, 26, ...

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path