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Oh, after the intro i was forgoten. lol.. that is probably for the best. 

Opinionated would be wrong CPhill.. It is eagar learner, generous helper, (primaray schooler) and future math talent. imo

You have a right-angled triangle with opposite = 9.4m and adjacent = 2.44m.  This means you use the tan function.

tan(θ) = 9.4/2.44  so θ = tan^-1(9.4/2.44)

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{tan}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{9.4}}}{{\mathtt{2.44}}}}\right)} = {\mathtt{75.448\: \!623\: \!543\: \!84^{\circ}}}$$

so θ ≈ 75.4°

Hi, I was looking at this today in my work but doesnt n equal to the nth term, with values (in most cases 0,1,2,3,4,5,6,7...; but which could be set to be less than 1 also I guess.) Is this right, could you elaborate for me please. Thanks.

supposedly it would be 5 2/3 or 17/3

Use sin^-1(0.95) on a calculator.  sin^-1 is often written as asin.  On the calculator on the home page here press the 2nd key first.

Volume of a cylinder is pi*radius^2*height, so you would need to know the radius as well in order to determine the height.

I think, correct me if i'm wrong, but I think 2+2 is an old Scandinavian saying for Viagra

Thank you for showing us how to do that Alan.  

That is really good.   

I set the ruler to 50cm, and found that the ruler grew 0.10725 (please check), then I found the ratio which was (ruler final by ruler initial) 1.002145 (please check I'm sure this is way to big of a number to be acurate), then I got stuck to calculate the rods actual growth and solve for the materials co-eficient of thermal expansion. Please assist me.

Ok, so the ruler can be any length so long as the length chosen ends up bigger than the ending rod length. I think i have it. 

I just take the ruler length to be 23.89, then my equation is 23.89x195x11E-6?

Just use the cosine inverse....so we have

cos^-1(.5379) = Θ = about 57.4592°

-7x-4y=1(-3-5) solve for x. solve right side

-7x-4y=-8      add 4y to both sides

-7x=4y-8    divide both sides by -7(to make x positive)

x=(4y/-7)+1.42   answer

or

-7x-4y=1(-3-5) solve for y. solve right side

-7x-4y=-8 add 7x to both sides

-4y=7x-8   divide both sides by -4( to make y positive)

y=-1.75+2   answer      

This says to "plug" 4 into the function "g" and evaluate the result. Unfortunately, we don't know what "g" is !!!!!

You would have to provide that piece of information before we could answer the question !!!!

Just multiply both sides by 2 sin(.9)...so we have

10*2sin(.9)  = 20sin(.9) = x          and assuming that .9 is in radians, we have.......

x = about 15.66

x=34 answer=1x

I did not understand. What we have done to solve it is set f(x) d/dx = d/dx(a_o+a₁x+a₂x²+a₃x³+a₄x⁴+....) Such that all terms with x become zero and non x terms become the values, then taking the derivative of both sides again to find the next term and so on. So i am confused by the above post. Thanks.

Most are spot on....!!!!

DragonSlayer554  → Opinionated  (????)

Yeah I know. i just gave the easy way. 

$$x$$ could be -1, -2, -3, etc., and postives are a whole bunch.

Let's get solving the expression (I think)!

let's substitute $$x$$ into 1.

Now, rewrite the expression.

$$-2-x>5\Rightarrow-2-1>5$$

Now, subtract.

$$-2-1=-3$$

Now, combine the expression.

$$-3>5$$

Because this is false, let's continue.

Now, change $$x$$ into -10.

$$-2-x>5\Rightarrow-2-(-10)>5$$

Now, solve.

$$\\\\-2-(-10)=-2+(10)\\\\=8$$

Now, combine the expression.

$$8>5$$

This makes the expression true, so one answer can be $$\boxed{8>5}$$.

The prime factorization is   2 x 7 x 3²

The formula would be.......

(-1)ⁿ * 8^(n-1)      (where n ≥ 1)

That's right, Dragon. U could also switch the steps.