2 , 4, 7, 15, 7, 4, 5, 4, 1 Find the new mean.

Round your answer to the nearest tenth.

5.4

Step-by-step explanation:

add all pieces of data together, you get 49. Since there are 9 pieces of data, we divide by 9. 49/9 is 5.4444 repeated, but if you round it to the nearest tenth, but since it's less than 5, you round down to 5.4 and not 5.5. In conclusion, the mean is 5.4

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc