Question Simplify the expression 210−80r Evaluate 210−r×80Solution 210−80r Show Solution Factor the expression 10(21−8r) Evaluate 210−r×80Use the commutative property to reorder the terms 210−80rSolution 10(21−8r) Show Solution Find the roots r=821Alternative Form r=2.625 Evaluate 210−r×80To find the roots of the expression,set the expression equal to 0 210−r×80=0Use the commutative property to reorder the terms 210−80r=0Move the constant to the right-hand side and change its sign −80r=0−210Removing 0 doesn't change the value,so remove it from the expression −80r=−210Change the signs on both sides of the equation 80r=210Divide both sides 8080r=80210Divide the numbers r=80210Solution r=821Alternative Form r=2.625 Show Solution