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GuDViN [60]
3 years ago
8

Six more than five times a number (x) is at least twenty-one

Mathematics
1 answer:
I am Lyosha [343]3 years ago
3 0
The answer to this would be 5x+6>=21. Just wanted points :P
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The diameter of a circle is:
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Factor completely: 3x2 + 12x + 7
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Step-by-step explanation:

Eliminate answer 4 immediately, because (4)(3) is not 7.

Look at answer 2:  7x + 3x = 10x, which does not match the middle term 12x in the original polynomial.  Eliminate answer 2.

Look at answer 1:  1x + 21x = 22x, which does not match the middle term of the original polynomial.   Eliminate answer 1.

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12²-4(3)(7), or 144 - 84, or 60.  Being positive, this tells us that the given poly has two real, unequal roots:

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x = ----------------- = -------------------  and   x = --------------------

            3                         3                                     3

Normally, if c is a root, then x - c is a factor.

If we try this here, however, the resulting factors do not at all match any of your answer choices.

Don't be offended...but please ensure you have copied this problem down correctly.

                                                           

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Below.

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Step-by-step explanation:

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3 years ago
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