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hjlf
3 years ago
9

The product of a number and negative two is the same as 5 less than the half the number. What is the equation the represents thi

s?
Mathematics
1 answer:
snow_tiger [21]3 years ago
3 0

Answer:

N(-2) = \frac{n(-2)\\}{2}-5       this is also equal to n=2.5

Step-by-step explanation:

multiply both sides by 2

-4n = -2n-5

add 2n to both sides

-2n = -5

divide both sides by -2

n=2.5

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4 0
3 years ago
a scientist in Asia discovered the skeleton of a Saber-Tooth Tiger that contains 54% of its original amount of C-14. Find the ag
PIT_PIT [208]
Answer is:
6162 years

Explanation:
The given equation to use is:
<span>N=Noe^-kt
First, we will need to define the variables of the equation as follows:
No : original amount of C-14 (at t=0)
N : amount of C-14 at certain time (t)
k : a constant equals </span><span>0.0001
t : the time in years

Now, we are given that:
The skeleton contains 54% of it's original amount of C-14. This means that:
N/No = 54% = 0.54

Substitute with this given in the equation given, we will find that the only unknown is the time (t). We can now solve for t as follows:
</span><span>N=Noe^-kt
This can be rewritten as:
N/No = </span>e^-kt
Now,
N/No = e^-kt
0.54 = e^(-0.0001t)
Take ln for both sides:
ln (0.54) = -0.0001t
-0.61618 = -0.0001t
t = 6161.86 years which is approximately 6162 years

Hope this helps :)


3 0
3 years ago
Solve this equation<br><br> 2.3 • (— 1.2)
oksian1 [2.3K]
2.3 times -1.2 is
-2.76
6 0
3 years ago
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