Answer:
34
Step-by-step explanation:
All angles of a triangle add up to 180 degrees so you would subtract from 180 with the angles you already have to get your answer. 180 - 115 - 31 = B which is 34.
<span>Therefore, the triangles ABD and CDB are congruent by SAS</span>
Y = 2 ( X - 3 ) ^ 2 - 4 =-4
I think that this an example of a paired t test. Since each student (subject) is given 2 treatments of the same material.