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snow_lady [41]
3 years ago
9

Factor completely 4x2 − 8x − 60. (4x − 20)(x + 3) 4(x − 5)(x + 3) (4x − 4)(x + 15) 4(x − 1)(x + 15)

Mathematics
1 answer:
katovenus [111]3 years ago
3 0

after complete factorization of 4x^2-8x-60 the answer is 4(x+3)(x-5)

Step-by-step explanation:

We need to factor 4x^2-8x-60

Taking 4 common and factorizing:

=4(x^2-2x-15)\\=4(x^2+3x-5x-15)\\=4(x(x+3)-5(x+3))\\=4(x+3)(x-5)

So, after complete factorization of 4x^2-8x-60 the answer is 4(x+3)(x-5)

Keywords: factorization, factors

Learn more about factors at:

  • brainly.com/question/1464739
  • brainly.com/question/1414350
  • brainly.com/question/10771256

#learnwithBrainly

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Answer:

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8 0
3 years ago
Somebody please help! Marked Brainliest!
olga nikolaevna [1]

Answer:

Part A:

The surface area of a cylinder is given by

A=  6πr² if h= 2r

Part B:

Total Cost of covering the cylinder = Rate *2πrh + rate*2πr²

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Step-by-step explanation:

Part A:

The surface area of a cylinder is given by

A= 2πrh + 2πr²

Where h= height and radius = r

But we have the height twice as radius so h= 2r

So putting h= 2r we get

A= 2πr(2r) + 2πr²

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Part B:

Cost = Rate * area of the wall + rate * area of the top and bottom

Cost = Rate *2πrh + rate*2πr²

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and area of the side = 2πrh

Multiplying both with the rate and then adding would give the total cost of materials needed to cover the outside of the cylinder and from top and bottom as well.

If  you do not need to cover top and bottom then the expression would be

Cost of covering only the side = Rate *2πrh

Part C:

Already done above.

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3 years ago
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Answer:

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the corrects answer is <em>B. −16 </em>

C. 20

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7 0
3 years ago
Read 2 more answers
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