A baseball player gives up 6 earned runs in 18 innings . If he continues at this rate how many earned runs will he give up in 81 innings?

27 earned runs

Step-by-step explanation:

Given

Rate: 6 runs in 18 innings.

Required

Determine the number of runs in 81 innings

First, we need to calculate the rate.

Represent the number of runs in 81 innings as x.

The rate of x runs in 81 innings is;

Equate both rates

Make x the subject

Hence, he will give up 27 earned runs

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: