SOLUTION: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Yolanda lost 90 points. How many bull's eyes did she have?

Algebra ->  Human-and-algebraic-language -> SOLUTION: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Yolanda lost 90 points. How many bull's eyes did she have?      Log On


   

Question 546126: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Yolanda lost 90 points. How many bull's eyes did she have?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
m + b = 30

5b - 10 = -90

solve using substitution or elimination