Question

Isabella lost 5 pounds the first week of her diet. Over the next three weeks, she lost 1 pound, gained 2 pounds, and then lost 2 pounds. What was the change in her weight over the four weeks?

Answer 1

Isabella lost a total of 6 pounds over four weeks after summing up her weekly weight changes: -5, -1, +2, and -2 pounds respectively.

Step-by-step explanation:

The change in Isabella's weight over four weeks can be calculated by summing up the individual weekly weight changes. She lost 5 pounds in the first week, lost 1 pound in the second week, gained 2 pounds in the third week, and lost 2 pounds in the fourth week. To find the total change, we simply add up these amounts while taking into account the sign of each change (loss as negative, gain as positive).

1. Week 1: -5 pounds
2. Week 2: -1 pound
3. Week 3: +2 pounds
4. Week 4: -2 pounds

Adding these together:

Total change in weight = (-5) + (-1) + (+2) + (-2) = -6 pounds

So, over the four weeks, Isabella has lost a total of 6 pounds.