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

Describe a way that someone could estime the length of a book

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

X2 + y 2 = 36 x + y = 6 solve the system of equations.