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melamori03 [73]
3 years ago
14

Mario surveyed the 17 healthiest patients in the hospital.

Mathematics
1 answer:
ser-zykov [4K]3 years ago
3 0

Step-by-step explanation:

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After a 20% price reduction, a cordless phone sold for $48. What was the phones price before the reduction?
GalinKa [24]
After 20% reduction the price is $48 which means $48 is only 80% of the original price...so let x= original price 
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Which statement about inequalities is NOT true?
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if b is greater than a, a can't be greater than b.

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State the number of complex roots, the number of positive real roots and the number of negative real roots of
harkovskaia [24]

9514 1404 393

Answer:

  • 2 complex roots
  • 2 positive real roots
  • 0 negative real roots

Step-by-step explanation:

The signs of the terms are + - - +. There are two sign changes, so 0 or 2 positive real roots.

Negating the signs of the odd-degree terms, the signs are + + + +. There are no sign changes, so 0 negative real roots.

For x=0, the value of the quartic is +3. For x=1, the value is -3, so we know there are 2 positive real roots, one of which lies in the interval (0, 1).

The 4th-degree polynomial equation must have 4 roots, so the other two must be complex.

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  • 2 positive real roots
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_____

The roots are approximately 0.489999841592, 2.06573034434, −0.777865092969 ± 1.53582061225i

8 0
3 years ago
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