Identify the addition property. 1. 78 + 0 + 52 = 78 + 52
2. 44 + 99 = 99 + 44
3. (67 + 34) + 67 = (34 + 67) + 67
4. (70 + 81) + 2 = 70 + (81 + 2)

I need help with identifying the addition property for each of the four questions.

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

Find the area of the triangle shown 3 by 6

Which ordered pair is a solution of the equation? 2x+3y=10