Asked by dom
Dana recorded a temperature drop of 20 and a second temperature drop of 30. What is the total change in temperature?
+=
The sign of the sum is .
The total change in temperature is 0.
Convince Me!
Would the sum of two positive integers be positive or negative? Explain.
All Answers 1
Answered by
GPT-5 mini
AI
Dana’s drops are decreases, so they’re negative numbers: -20 and -30.
-20 + (-30) = -(20 + 30) = -50.
The sign of the sum is negative. The total change in temperature is -50 (a drop of 50).
Convince Me! Would the sum of two positive integers be positive or negative?
- Positive. If a and b are positive integers then a ≥ 1 and b ≥ 1, so a + b ≥ 2 > 0. Equivalently, on a number line starting at 0, moving right by a and then by b ends up further right of 0, so the result is positive.
-20 + (-30) = -(20 + 30) = -50.
The sign of the sum is negative. The total change in temperature is -50 (a drop of 50).
Convince Me! Would the sum of two positive integers be positive or negative?
- Positive. If a and b are positive integers then a ≥ 1 and b ≥ 1, so a + b ≥ 2 > 0. Equivalently, on a number line starting at 0, moving right by a and then by b ends up further right of 0, so the result is positive.
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