To find a baseball pitcher earned run average (era) , you can use the formula ei=9r

Iam so stuck. what is the worked out answer for this question?

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25