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natulia [17]
3 years ago
15

Factor completely...................

Mathematics
1 answer:
defon3 years ago
3 0

Answer:

Final answer is A. 9(3x+1)(3x-2).

Step-by-step explanation:

Given expression is 81x^2-27x-18.

81x^2-27x-18

=9(9x^2-3x-2)

We can factor that by splitting middle term into two parts then do grouping as shown below:

=9(9x^2-6x+3x-2)

=9(3x(3x-2)+1(3x-2))

=9(3x+1)(3x-2)

Which correctly matches with choice A. 9(3x+1)(3x-2).

Hence final answer is A. 9(3x+1)(3x-2).

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A circle has a circumference of 45 cm. What is the BEST estimate of the circle’s diameter?
ch4aika [34]

Answer:

C) 15 cm is the best estimate.

Step-by-step explanation:

The exact answer is not there, so 15 is the best estimate.

You can use this equation to help you:

d=C/π

Where d is the diameter.

C is the circumference.

And the last one is Pi.

You know that C = 45, so divide that by Pi (3.14).

45/3.14159 = 14.32

The closest answer is 15.

Hope this helps! Have a great day!

8 0
2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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HELP ME PLEASE!
Sav [38]

Answer:

There are 60 lemon cookies.

Step-by-step explanation:

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8 0
3 years ago
The domain for f(x) and g(x) is the set of all real numbers.
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Answer:

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Step-by-step explanation:

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