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sergeinik [125]
3 years ago
14

A local newspaper said that the city of Luttrell is expected to grow by 10% each year. The population in 2012 is 130,457 people.

Let t represent the number of years after 2012. Which equation could be used to determine the total expected population, P, of Luttrell in t years?
Mathematics
1 answer:
Fofino [41]3 years ago
6 0

Answer:

yes becvaib it is

Step-by-step explanation:

yes 0

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3

Step-by-step explanation:

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2 years ago
X^2+4x+20=12x-5<br><br> Solve this equation
Scrat [10]

Answer:

4 + (or -) 3i

Step-by-step explanation:

Hi!

Alright, so we're going to move all of the variables and constants to one side. Then, using the quadratic formula, we'll find the answer.

1. Move 12x-5 to the left side of the equation by

  a. Subtracting 12x from both sides

  b. adding 5 to both sides.

1: x^2+4x+20-12x+5

2. Group the common terms

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3. Look at the problem. We can't factor this.

Explanation for why this isn't factorable (you can skip this)

(1) 25 is positive, so its two factors will both be either positive or negative. We're looking for a negative 8, so let's go with negative.

(2) Factors of 25: 1 & 25, 5 &5

Seeing the problem? Ya, none of the factors of 25 sum to eight. So, instead, we're going to use the quadratic formula.

4.  So, the quadratic formula: \frac{-b+-\sqrt{b^2-4ac} }{2a}

Our equation is x^2-8x+25=0

a is the constant in front of the x^2

b is the constant in front of the x

c is the term without any x values

so, a=1, b=-8, and c= 25

Into equation:

\frac{8+-\sqrt{64-4(1)(25)} }{2a}=\frac{8+-\sqrt{64-100} }{2}=\frac{8+-\sqrt{-36} }{2}

8/2 = 4

sqrt(-36) = 6i

6i/2 = 3i (remember, we still have the two in the denominator)

4 + (or -) 3i

8 0
2 years ago
Read 2 more answers
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Anvisha [2.4K]

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

i took the test :) gl

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zlopas [31]

Answer:

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Step-by-step explanation:

original 3:4

now 18:24

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