Can you add variables with different exponents

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

What is the equivalent fraction for the following fraction using 5 as the multiplier? 1/2

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?