let y= xsqt(5/3)

3ysqt(2)-2y+243=0

then factor it out.

let xsqt(5/3) to be equal to the value/s of y. then you got the value of x

252  =  36·7

113  =  16·7

√252 - √7 + √112  =  √36√7 - √7 + √16√7  =  6√7 - √7 + 4√7  =  (6 - 1 + 4)√7  =  9√7

sqt(252)=15.8745078663875435

-

sqt(7)=2.6457513110645906

+

sqt(112)=10.5830052442583624

=

23.8117617995813153

The volume of a sphere:  V  = (4/3)·π·r³   --->   V  =  (4/3)·π·(18)³ 

A hemisphere will have half the volume of the full sphere; so, divide the answer by 2 ...

yeah but wouldnt that be like saying x/(x-1) = x/x = 1, which makes x=all? 3/(3-1) ≠ 1? i dont have any more points about that i just wanted to make sure it was noticed (because its important)

while your point still stands because its infinity and stuff, i would like the mention one more thing

infinity/infinity is not indeterminate, its definetely 1. any number divided by itself equals 1, and while we may not be able to say what value infinity holds it is definetely equal to itself (reflexive property).

infinty is just an interesting topic ok?

24*2/3 = (24*2)/3

24*2=48

$${\frac{{\mathtt{48}}}{{\mathtt{3}}}} = {\mathtt{16}}$$

well there is a method that i use called the lattice method but i feel like if i try to explain it ill mess it up.

a quick google search does the trick just look up "lattice method".

its rad

which things

1/4 = 0.25

reciprocal of 1/4 is 4/1

4/1 = 4

reciprocal of 0.25 = 4

30/100*875

You cannot simplify it - it is as simple as it gets. 

Just subtract 7 from both sides

586947*EXP*.01*10

on most calc you would enter it like this - without the * s

586947EXP.01*10

it means

$$(586947*10^{0.01})*10$$

if I entered that on the web2 calc I would do it like this

586947*10^0.01*10

and this is the output

$${\mathtt{586\,947}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{{\mathtt{0.01}}}{\mathtt{\,\times\,}}{\mathtt{10}} = {\mathtt{6\,006\,187.519\: \!402\: \!117\: \!949\: \!280\: \!6}}$$

20=y+2(5y-1)

20=y+10y-2

20=11y-2

22=11y

y=2

3y  =  x + 1

2y + x = 9

If you solve the first equation for x, you get:  3y -1  =  x

If you solve the second equation for x, you get  x  =  9 - 2y

Since they are both solved for x, you can set them equal to each other:  3y - 1  =  9 - 2y

--->   3y - 1  =  9 - 2y

Add 2y to both sides:

--->   5y - 1  =  9

Add 1 to both sides:

--->   5y  =  10

Divide both sides by 5:

--->   y  =  2

Substitute this value back into either equation:  3y  =  x + 1   --->   3(2)  =  x + 1

     --->   6  =  x + 1     --->   x  =  5

Do you mean that you asked this question smartcookie?   :)

Smartcookie, you need to use the ^ (caret) symbol when you are using powers. 

$$3*y^2=2(y+4)$$

now take it all to one side and solve it as a quadratic equation.

$${\sqrt{{\mathtt{12\,007\,900\,001}}}} = {\mathtt{109\,580.563\: \!974\: \!639\: \!225\: \!252\: \!4}}$$

9-9=0

5x+9-9=5x

enter   

asin(3/4)

into the site calc

arc sine is the same as inverse sine  

-6/12 - 11/12 could be either -17/12 or -1  5/12

I do not understand the question 

It's simple. You multiply $400 by 20% then add the number you get to $400.

400*.20=

Add the number you get from that back to 400 and that is your answer.

$480

∞ - 1 is still infinity; so you have  ∞/∞.

But this is an indeterminate value; that is, it could have many different answers; the answer depends upon the question from which it arose --- it could be ∞, or -6, or 1, or π, or ... depending upon the problem.

Just pay attention when you take calculus ...