Answer:
The correct answer is D.) 23 units
Step-by-step explanation:
13 + 10 = 23, units can never be negative, so you add them as positives.
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The grapefruit is 18% heavier
The area of the desk is 39ft.
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You are adding a negative and a positive. It is like subtracting 2.1 from 3.26. Because 2.1 is negative, whenever you add it to a number, you actually subtract. To do this:
3.26 + (-2.1) is like 3.26 - 2.1
3.26 - 2.1 = 1.16
