Answer: To find the total weight of Petra's purchases, we need to add up the weight of each item she bought:
2 pounds of sugar
34 pounds of ground beef
23 pounds of cheese
7 pounds of tomatoes
Adding these weights together gives us:
2 + 34 + 23 + 7 = 66 pounds
Therefore, the total weight of Petra's purchases was 66 pounds.
Explanation: