Tell how the Communicative property of addition and the Associative property of addition can help solve the problem mentally 8+( -5)+(-8)
2 answers:
Step-by-step explanation:
Communicative property states that, in addition, integers added in any order will still give the same answer.
So in this question,
rather than first adding 8 + (-5), we add 8 + (-8)
We know that a number + its additive Inverse (opposite sign) is equal to zero
And we know any number added to zero is equal to the number.
So we can quickly find out that the sum is -5
Answer:
Communicative property states that, in addition, integers added in any order will still give the same answer. and a negative and a positive cancel out and your left with negative five so negative five would be your answer
Step-by-step explanation:
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Answer:
B what the other dude said
Step-by-step explanation:
x = 50
The angles shown are vertically opposite and thus equal
so 3x - 30 = 2(x + 10)
3x - 30 = 2x +20
subtract 2x from both sides
3x - 2x - 30 = 20
x - 30 = 20
add 30 to both sides
x = 20 + 30 = 50
Answer:
pretty sure C
Step-by-step explanation:
sorry if im incorrect information
