Question

Identify the illustrated property: the quantity p plus q end quantity plus r equals p plus the quantity q plus r end quantity

Answer 1

equation tool is really helpful here

Answer 2

then you don't have to write "end quantity" etc

Answer 3

\[(p+q)+r=p+(q+r)\] like that ?

Answer 4

\[(p+q)+r=(p+q)+r\]

Answer 5

Ah peaches :)

Answer 6

(p + q) + r = p + (q + r)

answer is in here..
http://www.purplemath.com/modules/numbprop.htm

Answer 7

i knowww

Answer 8

sorry i found out now