SOLUTION: The Cancer rate (number of deaths per 100,000 people) in the united states can be approximated by the equation y= -2.2x +216, where x is the number of years since 1990.solve this e

Algebra ->  Equations -> SOLUTION: The Cancer rate (number of deaths per 100,000 people) in the united states can be approximated by the equation y= -2.2x +216, where x is the number of years since 1990.solve this e      Log On


   

Question 366947: The Cancer rate (number of deaths per 100,000 people) in the united states can be approximated by the equation y= -2.2x +216, where x is the number of years since 1990.solve this equation for x. Use this new equation to determine in which year the approximate cancer death rate will be 150
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
y = -2.2x + 216

y - 216 = -2.2x

(y - 216)/-2.2 = x

Let y = 150 and solve for x.


(150 - 216)/-2.2 = x

30 = x

1990 + 30 = the year 2020.