13. Prove 6n + 3 is equivalent to 3n+ 2 + 3n + 1 by substituting n = 5 into both expressions.
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Out of the 180 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking? 72% 40% 54% 98%