Which property is illustrated by the statement? (3+2.8) + 5= 3+(2.8 +5)
a. commutative property of addition
b. commutative property of multiplication
c. inverse property of multiplication
d. associative property of addition

D. Associative Property of Addition

Step-by-step explanation:

In mathematics,  Associative Property of Addition says if you are adding , it does not matter where you put the parenthesis.The sum remains the same.

Symbolically:

Given statement :

Thus, only  Associative Property of Addition is illustrated by the given statement.

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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