Final answer:
To calculate the cost of 7 and 10 pounds of tomatoes, we first found the price per pound by dividing Isabel's total cost by the weight of her purchase. Multiplying the price per pound by 7 and 10 respectively gives us the costs: $10.50 for 7 pounds and $15.00 for 10 pounds.
Step-by-step explanation:
Isabel buys 4 pounds of tomatoes for $6.00. To determine how much 7 pounds and 10 pounds of tomatoes cost, we need to find the price per pound of tomatoes and then multiply that by the number of pounds desired.
First, we calculate the price per pound by dividing the total cost by the total weight of tomatoes:
Price per pound = Total cost / Total weight = $6.00 / 4 pounds = $1.50 per pound
Now we can find out the cost for 7 pounds and 10 pounds of tomatoes:
- 7 pounds × $1.50 per pound = $10.50
- 10 pounds × $1.50 per pound = $15.00
Therefore, 7 pounds of tomatoes cost $10.50 and 10 pounds of tomatoes cost $15.00.