At the school store the cost of three markers and two pencils is exactly $2.20 while the cost of four markers
and six pencils is exactly $3.40. Determine the cost of
one marker and one pencil at the school store using
the most appropriate algebraic method.

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?