A student is hanging a bookcase on the wall that holds their digital video disc (DVD) collection where each DVD in its case weighs the same. The weight of the bookcase with 10 DVDs is 30.4 pounds, and the weight of the bookcase with 45 DVDs is 38.8 pounds. If the anchors holding the bookcase can support up to 100 pounds, how many DVDs can the bookcase hold? This is from the Writing Linear Functions Unit Test from Connections Academy 8th grade question 11
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