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Ksenya-84 [330]
2 years ago
15

Write as a product of two binomials by factoring. x2+7x+12

Mathematics
2 answers:
pashok25 [27]2 years ago
6 0

Answers: (x-4) (x-3)

Ray Of Light [21]2 years ago
5 0

Answer:

(x+3)(x+4)

Step-by-step explanation:

x²+7x+12

12 we can rewrite as a multiplication: 1*12 or 2*6 or 3*4

7 we can rewrite it as a sum of which 2 numbers you see above?...3+4

x² +3x+4x +12 , write 7x as 3x+4x

x(x+3) + 4(x+3) , factor x from first 2 terms x²+3x and 4 from last 2 terms 4x+12

(x+3) (x+4) , factor x+3

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The doubling period of a bacterial population is 15 minutes. At time t= 80 minutes, the bacterial population was 90000​
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Answer:

here i finished!

hope it helps yw!

Step-by-step explanation:

The doubling period of a bacterial population is 15 minutes.

At time t = 90 minutes, the bacterial population was 50000.

Round your answers to at least 1 decimal place.

:

We can use the formula:

A = Ao*2^(t/d); where:

A = amt after t time

Ao = initial amt (t=0)

t = time period in question

d = doubling time of substance

In our problem

d = 15 min

t = 90 min

A = 50000

What was the initial population at time t = 0

Ao * 2^(90/15) = 50000

Ao * 2^6 = 50000

We know 2^6 = 64

64(Ao) = 50000

Ao = 50000/64

Ao = 781.25 is the initial population

:

Find the size of the bacterial population after 4 hours

Change 4 hr to 240 min

A = 781.25 * 2^(240/15

A = 781.25 * 2^16

A= 781.25 * 65536

A = 51,199,218.75 after 4 hrs

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What is the classification for this polynomial ? X^2y + 3x^3
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