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Is #20+ - 10# positive or negative?

Answer 1

Autumn Arnold

Positive.

Adding a negative number is the same as subtracting a positive one. So, #20+(-10)# is the same as #20-10#

#20-10=10#, so the answer is positive.

(The number of positives (20) is more than the number of negatives (10), so the answer will be positive.)

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Answer 2

Autumn Arnold

20 + (-10) is equal to 10, which is positive.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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