[tex]4\cdot(7\cdot y)=(4\cdot7)\cdot y=28y\\\\Associative\ property:\ (a\cdot b)\cdot c=a\cdot(b\cdot c)[/tex]
Associative property.
28y is equivalent to 4⋅(7⋅y).
Given expression: 4·(7·y)
4·(7·y) = (4·7)·y = 28y
Associative property: (a·b)·c = a·(b·c)
Therefore, 4·(7·y) = 28y
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