Can I have some help with this word problem?

Question

To find the baseball pitcher’s earned run average (ERA), you can use the formula Ei = 9r, in which E represents ERA, i represents the number of innings pitched, and r represents the number of earned runs allowed. Solve the equation for E. What is a pitcher’s ERA if he allows 44 earned runs in 63 innings pitched? If necessary, round your answer to the nearest hundredth.

Answer 1

Okay, let's take a shot at this...

First, we are given the formula E * i = 9 * r.

Second, we are asked to solve for E. If i does not equal zero, then we can divide both side of this equation by i. (Note that i = the number of innings pitched, which is never zero.) We then have the equation E = (9 * r) / i.

Third, we are given some numerical values for our variables, and asked to use this equation to solve for E.

Substituting r = 44 (earned runs allowed) and i = 63 (innings pitched) into the equation and we have

E = (9 * 44) / 63 = 6.29 (rounded to the nearest hundredth)