Question

Mario is teaching himself to play guitar. Let x represent the number of days that have passed. Let y represent the number of minutes practiced. The following equation describes the amount of time that Mario practices: y=85- 5x After how many days will Mario only be practicing for 40 minutes?

Answer 1

9 days

Explanation:

Y= minutes practiced

X= days

Mario practiced 40 minutes So Y= 40

40= 85-5x

40(-85)=85 (-85) -5x

-45=-5x

-45/(-5)= -5x/(-5)

9=x