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andrew11 [14]
3 years ago
8

⚠️Help me with math please ​

Mathematics
1 answer:
Hunter-Best [27]3 years ago
6 0

Answer:

what am I supposed to answer

Step-by-step explanation:

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(4x + 8x - 5) + (3x2 + 6x - 7)
ch4aika [34]

Answer:

7x^2 + 14x - 12

Step-by-step explanation:

Add like terms:

(4x + 8x - 5) + (3x2 + 6x - 7) becomes:

  4x^2 + 8x - 5               or (grouping like terms in columns):

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---------------------

 7x^2 + 14x - 12

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3 years ago
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9514 1404 393

Answer:

  486 square units

Step-by-step explanation:

Use the surface area formula with the given numbers.

  SA = 2(LW +H(L +W))

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The surface area of the box is 486 square units.

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