Since, it is given that 
Now, we have to identify the addition property for the given equation.
Associative property of addition states that for any real numbers say 'a' , 'b' and 'c', a+(b+c) = (a+b)+c
So, in the given question 28+29+42
We can use associative property as
(28+29)+42 = 28+(29+42)
57+42 = 28+71
99 = 99
Hence, among the given properties, associative addition property is used.
Answer:
31
Step-by-step explanation:
Following PEMDAS: Do the division first followed by the subtraction.

Answer:
Hardness your cork energy and let it rip
Step-by-step explanation:
First: You must have banger cork 7s and dub 10s on trampoline.
Second: Find a large jump
Third: Hardness your cork energy
Finally: let it rip
If she cuts it then the angle would become a right angle so it sould be 90º
Answer:
It is a rational number
Step-by-step explanation:
A rational number is defined as numbers written in p/q form ,q not equal to 0,p&q are integers
-6 is same as -6/1
since -6,1 are integers it is a rational..