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erastovalidia [21]
3 years ago
8

Heeeeeeeeeeeeeeeeeeeeeeelp please extra 30 points if correct

Mathematics
1 answer:
kirill [66]3 years ago
4 0
Not correct.. i should choose 3 .-3x+6

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21×9=9×21 what property is used
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3 years ago
The surface area of this regular pyramid is 1040 cm2. The base is a regular pentagon with side b = 16 cm and slant height l =15
Valentin [98]

Answer:

(a) = 11 cm

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  1. B + (1/2*80*15) = 1040
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  3. 1040 - 600 = 440 (440 is the area of pentagon)
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The apothem is 11 cm. Hope this helps!

6 0
3 years ago
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