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NISA [10]
3 years ago
10

Helppppppppppppppppppppppppppppppppppppp

Mathematics
1 answer:
Gnoma [55]3 years ago
3 0

The expression x²-14x+31=63 is a quadratic equation. To solve it, you must order it:


 x²-14x+31-63=0

 x²-14x-32=0


 Then, you must apply the quadratic formula, which is shown below:


 x=(-b±√(b^2-4ac))/2a


 So you have the values of a,b and c:

:

 a=1

 b=-14

 c=-32


 When you substitute those values in the quadratic formula, you obtain:


 x=(-(-14)±√((-14)^2-4(1)(-32))/2(1)

 x1=-2

 x2=16

 So, the correct option is the third one: x=-2 or x=16

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There would be 173,535 lionfish after 6 years.

Since lionfish are considered an invasive species, with an annual growth rate of 67%, ya scientist estimates there are 8,000 lionfish in a certain bay after the first year, A) to write the explicit equation for f (n) that represents the number of lionfish in the bay after n years; B) determine how many lionfish will be in the bay after 6 years; and C) if scientists remove 1,200 fish per year from the bay after the first year, determine what is the recursive equation for f (n); the following calculations must be performed:

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Learn more about maths in brainly.com/question/25851847

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