Answer:
A, C, D
Step-by-step explanation:
The sum of two irrational numbers may be rational:
√2 + (-√2) = 0
so that set is not closed under addition.
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For any of the other sets, addition of two members of the set always results in another (not necessarily different) member of the set.
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Answer:
3.75 or 15/4
Step-by-step explanation:
8x+5=35
Subtract 5 from the left side to cancel it out, do the same thing to 35.
8x=30
Divide 8x by 8 to get x alone, do the same thing to 30.
x=3.75, or once you simplify 30/8, you get 15/4.
Answer:
So your question is?
Step-by-step explanation:
9x + 20y = 109x + 20y
9x = 109x
109x - 9x = 0
100x = 0
x = 0
