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Bone-shaped treats are 5 for $3.50 at Shelley’s store and Sarah wants to buy 12. She set up and solved this proportion to find how much they would cost. Describe her error and find the correct solution.

5
3.5
=
12
x
3.5x = 60
x = $17.14

User Sher Mi
by
3.9k points

2 Answers

10 votes

Answer:

Sarah multiplied the denominator by the denominator and the numerator by the numerator instead of finding the cross products. The equation should be 5x = 42, so the cost should be $8.40.

Step-by-step explanation: its the sample response

User InsertNickHere
by
4.3k points
3 votes

Answer:

Sarah multiplied the denominator by the denominator and the numerator by the numerator instead of finding the cross products. The equation should be 5x = 42, so the cost should be $8.40.

User Mbschenkel
by
3.8k points