Find the gcf of the numbers.

28, 42
21, 99
34, 85
12, 36

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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.