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Bumek [7]
3 years ago
13

A cable company charges $75 for installation plus $20 per month. Another cable company offers free installation but charges $35

per month. For how many months of cable service would the total cost from either company be the same?
(a) 5
(b) 7
(c) 2
(d) 3
Mathematics
2 answers:
uranmaximum [27]3 years ago
7 0
Your answer would be (A) :)
kifflom [539]3 years ago
3 0
It would be 5 months because if you do 75 + 20x = 35x
15x = 75
----- ------
15 15
x = 5
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7 0
3 years ago
For the love of God help me !! I'm desperate for it tomorrow
Eduardwww [97]
Try to relax.  Your desperation has surely progressed to the point where
you're unable to think clearly, and to agonize over it any further would only
cause you more pain and frustration.
I've never seen this kind of problem before.  But I arrived here in a calm state,
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I believe I've been able to crack the case.

Consider this:  (2)^a negative power = (1/2)^the same power but positive.

So: 
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The rest is just turning the crank.

Now let's look at the problem:

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Subtract  log₂(x)  from each side: 

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Subtract  log(base 1/2) (x-2)  from each side:

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Take the antilog of each side:

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Multiply each side by 'x' :  x - 1 = x² - 2x

Subtract (x-1) from each side:

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Using the quadratic equation, the solutions to that are
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4 0
3 years ago
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