A minor league baseball pitcher threw 18 strikes in his first 40 pitches for a strike percentage of 45%. He wants to raise this percentage to 60% by throwing a certain number of strikes in a row. To model this, he thought of the rational expression x+18x+40. What does x represent in this expression?
A.The number of consecutive strikes the pitcher must throw to raise his percentage to 60%.
B. The total number of strikes the pitcher will throw throughout the game.
C.The total number of balls the pitcher will throw throughout the game.
D. The number of balls that the pitcher has already thrown.