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Marianna [84]
3 years ago
8

Round 3487 to the nearest thousand​

Mathematics
2 answers:
dlinn [17]3 years ago
6 0

Answer:

3000

Step-by-step explanation:

the 4 next to the 3 means that you will be rounding down.

Ronch [10]3 years ago
5 0

Answer:

the answer will be 3000

because 487 is near

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5. Find the discriminant of 15x2 = 4x – 1 and describe
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Answer:

a) The discriminant of the equation =  - 44

b)The nature of the roots will be imaginary.

c) x = \frac{2 +\sqrt{11} i}{15}  or, x = \frac{2 - \sqrt{11} i}{15}

Step-by-step explanation:

Here, the given expression is 15x^{2}  = 4x -1

or, 15x^{2}  -  4x + 1   = 0

Now the discriminant (D) of a quadratic equation ax^{2}  +b x + c   = 0

D = b^{2}   -  4ac  = (-4)^{2}  -  4(15) (1)  = 16 - (60) = -44

Hence, the discriminant of the equation =  - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : x = \frac{-b \pm \sqrt{b^{2}  - 4ac} }{2a}

So, here x = \frac{-(-4) \pm \sqrt{D} }{2a}  = \frac{4 \pm \sqrt{(-44 )} }{30}

So, either x = \frac{4 + \sqrt{(-44 )} }{30} or, x =  \frac{4 - \sqrt{(-44 )} }{30}

or, x = \frac{2 +\sqrt{11} i}{15}  or, x = \frac{2 - \sqrt{11} i}{15}

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Step-by-step explanation:

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In your own words, explain the place-value relationship when the same two digits are next to each other in a multi-digit number.
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