Elisa's mom teaches at a preschool. there is 1 teacher for every 12 students at the preschool. elisa is setting up equivalent ratios to find the number of teachers at the preschool. determine her mistake and correct it.

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step-by-step explanation:

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.