If i had 30 students in a class and the average age was 20.9 and i added twins and the average age changes to 21.6 years old, how old are the twins?

Which statement accurately explains whether a reflection over the y axis and a 270° counterclockwise rotation would map figure acb onto itself?

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok

The center on a target has a diameter of 5 inches. the whole target has a diameter of 25 inches. complete the explanation for what part of the whole target is the center. the center of the target takes up % of the whole target.