SOLUTION: In baseball, the equation E=9R/I gives a pitcher's earned run average E, where R is the number of earned runs the player's allowed and I is the number of innings pitched A. Solve

Algebra ->  Systems-of-equations -> SOLUTION: In baseball, the equation E=9R/I gives a pitcher's earned run average E, where R is the number of earned runs the player's allowed and I is the number of innings pitched A. Solve       Log On


   

Question 1163902: In baseball, the equation E=9R/I gives a pitcher's earned run average E, where R is the number of earned runs the player's allowed and I is the number of innings pitched
A. Solve the equation for I. State an properly or provide an explanation for each step
B. Last leason, a pitcher had an earned run average of 2.80 and allowed 70 earned runs. How many innings did the pitcher pitch last season?

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
E=9R/I
I=9R/E. Multiply both sides by I and then divide both sides by E.
2.8=9*70/I
2.8I=630
I=225 innings
Can check by converting 225 innings to games which is 225/9 or 25
25 games, 70 ER per game, 2.8 ERA.