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determine whether the two expressions are equivalent. if so, tell what property is applied if not explain why.


1. 15+(5+8) and (15+5)+8

2. (20-12)-3 and 20-(12-3)



tell and answer and explain

Respuesta :

1. The Associative Property of Addition.
Both equations equal 28.

2. The equations are not equal.
dexteright02
The Adding Associative Property

we always do what's in the parenthesis first!

1. 15+(5+8) and (15+5)+8
[tex]15+(5+8) = (15+5)+8[/tex]
[tex]15+13 = 20+8[/tex]
[tex]\boxed{28=28} (TRUE)[/tex]
equivalent

2. (20-12)-3 and 20-(12-3)
[tex]8-3=20-9[/tex]
[tex]\boxed{5=11}(FALSE)[/tex] → [tex]\boxed{5 \neq 11}[/tex]  not equivalent



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