Búscalo en m a t h w a y hay tiene que aparecer que tengas buen día
Answer:
Step-by-step explanation:

The margin of error decreases with an increased sample size and increases with an increase in confidence level.
So you add all the like terms.......i.e numbers with same variable
so,
5x+9y-7x+2-5y-7x+2-3x
=(5-7-7-3)x+(9-5)y+2+2
=-12x+4y+4
Answer:
just turn the percentage into a decimal then you multiply or add