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Xelga [282]
3 years ago
11

Andrew bought a computer for $650, a printer for $135.89, and two printer cartridges for

Mathematics
2 answers:
Naddika [18.5K]3 years ago
8 0

Answer:

814.68

Step-by-step explanation:

650+135.89+28.79=814.68

konstantin123 [22]3 years ago
5 0

Answer:

$843.47

Step-by-step explanation:

First off I added 650 to 135.89 to get 785.89. Then I added 57.58 because Andrew bought 2 cartridges. Add 57.58 to 785.89, and you get your answer.  

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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,
having just finished my dinner and spent a few minutes rubbing my dogs, and
I believe I've been able to crack the case.

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

So: 
Whatever power (2) must be raised to, in order to reach some number 'N',
the same number 'N' can be reached by raising (1/2) to the same power
but negative.

What I just said in that paragraph was:  log₂ of(N) = <em>- </em>log(base 1/2) of (N) .
I think that's the big breakthrough here.
The rest is just turning the crank.

Now let's look at the problem:

log₂(x-1) + log(base 1/2) (x-2) = log₂(x)

Subtract  log₂(x)  from each side: 

log₂(x-1) - log₂(x) + log(base 1/2) (x-2) = 0

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

log₂(x-1) - log₂(x)  =  - log(base 1/2) (x-2)  Notice the negative on the right.

The left side is the same as  log₂[ (x-1)/x  ]

==> The right side is the same as  +log₂(x-2)

Now you have:  log₂[ (x-1)/x  ]  =  +log₂(x-2)

And that ugly [ log to the base of 1/2 ] is gone.

Take the antilog of each side:

(x-1)/x = x-2

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

Subtract (x-1) from each side:

x² - 2x - (x-1) = 0

x² - 3x + 1 = 0

Using the quadratic equation, the solutions to that are
x = 2.618
and
x = 0.382 .

I think you have to say that <em>x=2.618</em> is the solution to the original
log problem, and 0.382 has to be discarded, because there's an
(x-2) in the original problem, and (0.382 - 2) is negative, and
there's no such thing as the log of a negative number.


There,now.  Doesn't that feel better. 
 






4 0
3 years ago
What is 22.45 and 90.32 rounded to the nearest whole number
ollegr [7]
22.45 would be 22, and 90.32 would be 90
8 0
3 years ago
48-5+2x3+6.
kkurt [141]
The parentheses must be placed here 48 - (5 + 2) * 3 + 6 in order for the equation to equal 33.
3 0
3 years ago
the average u.s. citizen throws away about 1,606 lb of trash each year. find this rate in pounds per month, to the nearest tenth
erik [133]

Answer:

The average U.S. citizen throws away about 133.8 pounds of garbage a month.

Step-by-step explanation:

First take the total amount of trash thrown away in a year (1,606), and divide it by the number of months in a year (12).

1,606 / 12 = 133.833333

You would get 133.833333 and would round it to the nearest tenth and get 133.8.

8 0
3 years ago
Read 2 more answers
Which number line shows the solution to 5 + (−5)?
alex41 [277]

Answer:

first one is A  and the second one is B.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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