Which expression is equivalent to?

Me what is the value of x? showing work would be appreciated - ! : )

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant. given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.