The stem-and-leaf plot shows the ages of residents of a retirement home. How many residents are older than 80? Ages of Residents Sandy Ridge Autumn Care Leaf Stem Leaf 1 3 4 6 0 2 1 3 3 5 6 7 2 4 5 6 6 6 8 2 4 4 4 7 9 8 1 2 2 4 1 1 6 6 8 8 9 9 1 2 9 9 9 0 10 0 1 2 A. Sandy Ridge, 6; Autumn Care 4 B. Sandy Ridge, 13; Autumn Care 11 C. Sandy Ridge, 8; Autumn Care 9 D. Sandy Ridge, 14; Autumn Care 12

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

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5