Ellie bought 23 chicken wings for $55.20. What's the unit cost of one wing? On the double number line below, fill in the given values, then use multiplication or division to find the missing value.

if x = 1, then the answer is 3.5

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.