Which one is larger 4'2 or 3'3

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show