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Under the "log" key there is a tiny arrow. Click on it and you should see "ln".

N/2 = M

M + 6 = -2

Solve the following system:
{N/2 = M | (equation 1)
M+6 = -2 | (equation 2)
Express the system in standard form:
{N/2-M = 0 | (equation 1)
0 N+M = -8 | (equation 2)
Multiply equation 1 by 2:
{N-2 M = 0 | (equation 1)
0 N+M = -8 | (equation 2)
Add 2 × (equation 2) to equation 1:
{N+0 M = -16 | (equation 1)
0 N+M = -8 | (equation 2)
Collect results:
Answer: |N = -16               and                     M = -8

This is first-order linear ordinary differential equation:

Solve the separable equation ( dv(t))/( dt)+2V-9.8 = 0:
Solve for ( dv(t))/( dt):
( dv(t))/( dt) = -2.V+9.8
Integrate both sides with respect to t:
Answer: |v(t) = integral(-2.V+9.8) dt = (-2.V+9.8) t+c_1, where c_1 is an arbitrary constant

This is what might be easy to remember:

part / whole * 100%

in this case $551 is the whole (100%), and $84 is the part

so $84 / $551 * 100% =15,2%

roots of equation x^3+3x^2+3x+3

\(\small{ \begin{array}{|lrcll|} \hline & x^3+3x^2+3x+3 &=& 0 \quad &|\quad x^3+3x^2+3x+1 = (x+1)^3 \\ & (x+1)^3 +2 &=& 0 \\ & (x+1)^3 &=& -2 \\ & x+1 &=& \sqrt[3]{-2} \\ & x &=& \sqrt[3]{-2} -1 \\\\ (1) & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\cos(\frac{\pi}{3}) + i \cdot \sin(\frac{\pi}{3})) \quad &|\quad \tan{\varphi} = \frac{0}{-2}~ \Rightarrow ~ \varphi = \pi \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\frac12+ i \cdot \frac{\sqrt{3}}{2} ) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot \frac12+ i \cdot \frac{\sqrt{3}}{2} \cdot \sqrt[3]{2} \\ & x_1 = \sqrt[3]{-2}-1 &=& \sqrt[3]{2} \cdot \frac12 - 1 + i \cdot \frac{\sqrt{3}}{2} \cdot \sqrt[3]{2} \\ & \mathbf{x_1} &\mathbf{=}& \mathbf{-0.37003947505 + i \cdot 1.09112363597 }\\\\ (2) & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\cos(\frac{\pi}{3}+\frac23 \pi) + i \cdot \sin(\frac{\pi}{3}+\frac23 \pi)) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\cos(\pi) + i \cdot \sin(\pi)) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (-1+ i \cdot 0 ) \\ & \sqrt[3]{-2} &=& -\sqrt[3]{2} \\ & x_2 = \sqrt[3]{-2}-1 &=&-\sqrt[3]{2} - 1 \\ & \mathbf{x_2} &\mathbf{=}& \mathbf{-2.25992104989} \\\\ (3) & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\cos(\frac{\pi}{3}+2\cdot \frac23 \pi) + i \cdot \sin(\frac{\pi}{3}+2\cdot \frac23 \pi)) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\cos(\frac53 \pi) + i \cdot \sin(\frac53 \pi)) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot (\frac12- i \cdot \frac{\sqrt{3}}{2} ) \\ & \sqrt[3]{-2} &=& \sqrt[3]{2} \cdot \frac12- i \cdot \frac{\sqrt{3}}{2} \cdot \sqrt[3]{2} \\ & x_3 = \sqrt[3]{-2}-1 &=& \sqrt[3]{2} \cdot \frac12 - 1 - i \cdot \frac{\sqrt{3}}{2} \cdot \sqrt[3]{2} \\ & \mathbf{x_3} &\mathbf{=}& \mathbf{-0.37003947505 - i \cdot 1.09112363597} \\\\ \hline \end{array} } \)

if an employee received an hourly rate at 17 dollars working 70.5 biweekly.how much will that employee make for the year.

I think this what you mean:

$17 per hour for 70.5 hours every 2 weeks?

$17 x 70.5 x 26 =$31,161 This would be gross salary before any deductions.

Scientists say that the earliest evidence of life on Earth was found in fossilized mats of cyanobacteria in Australia. This fossilized cyanobacteria, called stromatolites, is 3.4 billion years old. This bacteria, which are still around today, are seen as being biologically complex because they have cell walls that protect their DNA. Despite this discovery, scientists believe that life started before this, possibly as far back as 3.8 billion years ago.

One of the most commonly talked about theories on how life began on Earth involves organisms that came from a distant world. Scientists who believe this theory say that these organisms became attached to comets and asteroids as they traveled through space. Some of these comets and asteroids eventually made their way to Earth, which provided the perfect atmosphere for the organisms to thrive. Biochemist David Deamer at the University of California says that these organisms probably came from multiple origins outside the Earth's solar system, so those origins are hard to trace.

Math 

 What percentage of $551 is $84?

x% x $551 = $84 divide both sides by $551

x% =$84 / $551 =0.15245 x 100 =15.245%

how many times do you times 450 to get 5,280?

5,280 / 450 =11 11/15

Solve for x:
x^3+3 x^2+3 x+3 = 0

Subtract 2 from both sides:
x^3+3 x^2+3 x+1 = -2

Factor x^3+3 x^2+3 x+1 into a perfect cube:
(x+1)^3 = -2

Taking cube roots gives (-2)^(1/3) times the third roots of unity:
x+1 = (-2)^(1/3) or x+1 = -2^(1/3) or x+1 = -((-1)^(2/3) 2^(1/3))

Subtract 1 from both sides:
x = (-2)^(1/3)-1 or x+1 = -2^(1/3) or x+1 = -((-1)^(2/3) 2^(1/3))

Subtract 1 from both sides:
x = (-2)^(1/3)-1 or x = -1-2^(1/3) or x+1 = -((-1)^(2/3) 2^(1/3))

Subtract 1 from both sides:
Answer: |x = (-2)^(1/3)-1     or     x = -1-2^(1/3)     or      x = -1-(-1)^(2/3) 2^(1/3)

You to deare

Its not possible.

 [8 +1/4] - [4.5]   

[ 8 + 1/4] - [ 4 + 1/2]       covert to improper fractions

[ 33/4 ] - [ 9/2]                  get a common denominator           

[33/4] - [ 18/4]  =

15/4  =

3 + 3/4  inches above ground

She could have mailing lists and so do whole loads at once.

2x^2+7+57=0     if this is correct, it will not have real solutions....simplify

2x^2 + 64   = 0    subtract 64 from both sides

2x^2  = - 64     divide both sides by 2

x^2  = -32         take the pos/neg square roots

x = ± √-32   = ± √ ( -1 * 16 * 2)   =  ± 4i√2

I have had a long look at this one - I think the integral is intractable.Which means you can't solve it algebraically.   Did this one crop up in a text book?