13 packs of meat patties and 16 packs of buns
Let x be the length and y be the width of a rectangle.
Area = xy
When x and y are doubled
Length = 2x and Width = 2y
Area = 2x x 2y
Area = 4xy
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Answer: When the dimension is doubled, the area is 4 times the original.
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F(-1) = 12 - 5(-1)
f(-1) = 12 + 5
Solution: f(-1) = 17
If you could post the picture I can help