I can help with 3
Each side is different because the rectangle has opposite sides, so the equations should be different
Answer: 63
Hopefully the work makes sense but basically you will add equation DE and EF to get 6x+11 then use that equation with DF and solve for x which will get 26/3 then plug it into DF to get 63
Longest book: 396 Shortest book: 1/4×396=99 Middle book: 3×99= 297
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If the book in the middle of her shelf has three times the number of pages of the shortest book then how many pages does the middle book have?
Answer: 297</span>
Bob has to tile a rectangular floor that is 10 by 20 feet
he has tiles with tiles that are 1 foot square
how many tiles does he need
area=legnth times wdith=10 times 20=200
200 square feet=200 tiles
