SOLUTION: in maryland speed fine are determined by formula f=10(x-65) +50 where f is the cost in dollar of the fine if a person is caught drriving x miles per hours. a fine comes to $400. h

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: in maryland speed fine are determined by formula f=10(x-65) +50 where f is the cost in dollar of the fine if a person is caught drriving x miles per hours. a fine comes to $400. h      Log On


   

Question 270392: in maryland speed fine are determined by formula f=10(x-65) +50 where f is the cost in dollar of the fine if a person is caught drriving x miles per hours.
a fine comes to $400. how fast was the person speeding
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
f=10(x-65)+50
400=10(x-65)+50
400=10x-650+50
10x=400+650-50
10x=1,000
x=1,000/10
x=100 mph. was the speed.