Mrs. Park has 3 boxes of crayons. Each box has 12 crayons. Mrs. Park takes c crayons out of each box. Which expression can be used to find the total number of crayons left in these boxes?

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Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

The surface area of the triangular prism is .