Respuesta :

MMMski
11. 21g
12. ?
13. X=1.35
14. X>-1

(I'm not sure about 12 because I don't have any paper to solve it at the moment. Sorry! Hope this helps anyway!)
11.B. 21+g
12.B.1 because 5/1/5=1
13. 1.35 because 4-2.65=1.35
14. A. x>-1