All Answers 358504 Answers

Try it in the calulator on this very site, sinh(28.95757/30.816) = 1.084223469941

In radians

sin-1(28.95757/30.816) = 1.221730684928    NOT  1.08422336464  !!!

Convert  1.221730684928  to degrees...it should be about 70 degrees

I need my math to be accurate to 3 decimal places. This is off by more than 7 degrees.

x^2 − 2x − 2 = 0

This won't factor...using the onsite calculator (and the quadratic formula)....we have....

$${{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{2}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{1}}{\mathtt{\,-\,}}{\sqrt{{\mathtt{3}}}}\\
{\mathtt{x}} = {\sqrt{{\mathtt{3}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{0.732\: \!050\: \!807\: \!568\: \!877\: \!3}}\\
{\mathtt{x}} = {\mathtt{2.732\: \!050\: \!807\: \!568\: \!877\: \!3}}\\
\end{array} \right\}$$

So we have...

Sin(X) = 28.95757 / 30.816

Using the sine inverse...( and making sure that we're in degree mode)

sin^-1( 28.95757 / 30.816) = about 70 degrees

Try this again and see if you don't get the same result.....

So we have........

-2      1     0    -2     -3k

               -2     4      -4

         1    -2     2        4

So -3k - 4 = 4

Add 4 to both sides

-3k = 8

So,  k = -8/3

x=2 

x2-2x-2=0

+2x +2x

x -2=0

+2

x=2

173-21=152
152/8=19

What's 9 + 10? 21 

$108.90 $3.63x30=$108.90

62.7 (Rounded)

Don't bully.

You stupid 

"Of" means "multiply"  ...   So we have  .....

(5.7)N = 9.5    divide both sides by 5.7

N = 5/3  = about 1.66

What the heck?  Maybe squaling on your head

1/2 x 1000 x 25 = 500 x 25 = 12500

who knows

I will not give away my name.  Why do you need to know?  What does this have to do with math?

We can construct this as a linear relationship with the x values being the time and the y values representing the height at some time.

And we have the points (2, 3.5) and (5, 8.75)

We can find he slope of this line  by taking the difference in the y values and dividing this by the difference in the x values.

So we have  (8.75 - 3.5) / (5 - 2) =  5.25/ 3

And using one of the points - I'll choose (2, 3.5) - and the slope, we can write the equation of the line....so we have.....

y - 3.5 = (5.25 / 3)(x - 2)  simplify

y =  (5.25x) / 3 - 10.5/3 + 3.5

y =  (5.25x) / 3 - 3.5 + 3.5

y =  (5.25x) / 3

So, after 3 years, we have

y = 5.25(3) / 3 = 5.25 ft tall

1/2 of 1000 = 500

500x10=1000, 1000 x 2.5=15000

15000

You're incorrect.  19

Inputting sqrt3(10) in the calculator solves the equation x^3=10.

Thanks Chris

I will assume Gino's anser is correct but it is not in standard form.

$$\\y = 5x -7/4\\
4y=20x-7\\
7=20x-4y\\
20x-4y=7$$