All Answers 358512 Answers

$$n=\dfrac{a-1}{3}$$

$$x = \dfrac{y-b}{m}$$

$$i= f+gt$$

Okay, that is really good.  I like working through proofs too,  they can be very challenging  

$$I=A-P$$

$$w=\dfrac{V}{lh}$$

$$w=\dfrac{V}{lh}$$

@@ End of Day Wrap      Fri 30 /1/15        Sydney, Australia         Time 12:25 am (Really Sat morning)

Good day to you all,   

Another very busy day and our industrious answerers were: CPhill, saseflower, Jillybean, Heureka, alan, Happy7, sasini, Rosala, InovativeProgrammer, Loleris, Tiddle, Zegroes, TayJay, and nagendra.  What a  lot of helpers we have these days.  It is a good thing to because there are sooooo many questions.  A huge thank you to each of you.   

Interest posts:

If a circle's circumference is 15 inches, what is its radius ?

$$\small{\text{
$
C=15 $\ inches $\qquad $ radius $ = \dfrac{7.5 }{\pi} $\ inches
}}$$

Acctually，i had learned how to prove this two years ago.But now i forgot some,so i decided to prove this again.

and post this post on the forum.

i  enjoy at prove any math theory or law.so yeah....................

C = 2πr     Solve this formula for r

$$\small{\text{$
r= \dfrac{C}{2\pi}
$
}}$$

Sat 31/1/15

$$\small{\text{$
c= \dfrac{a}{46}
$
}}$$

$$t = \dfrac{d}{r}$$

Find the time, in hours, that it would take Van Dyk to travel 26.2 miles if his average speed was 18 miles per hour. The time was about 1.3 hours. Round to the nearest hundredth

$$\small{\text{
$ 26.2\ \small{\text{miles}}* \dfrac{\ 1 \small{\text{ hour }} }{18 \small{\text{ miles }} } = 1.46 \small{\text{ hours }}
$
}}$$

the answer is one billion five hundred fifty million.

oh i thought sydney!australia loooks really big....im not that good in geography!

don't you like my big brain Rosala   

tiddle ......... great replies!

and zegroes.......you never answer first so please stop living in mars.......we human beings  surround you and are educated people living on the blue planet earth......sorry none of us are like your relatives(from mars)

There is no conjugate on the second one compare it to surds for it is much the same

rationalize the denominator

$$\\\frac{6}{2\sqrt5}=\frac{6}{2\sqrt5}\times\frac{\sqrt5}{\sqrt5}=
\frac{6\sqrt5}{2*5}=\frac{6\sqrt5}{10}=\frac{3\sqrt5}{5}\\\\\\
BUT\\\\
\frac{6}{2+\sqrt5}=\frac{6}{2+\sqrt5}\times\frac{2-\sqrt5}{2-\sqrt5}=\;\;etc$$

i need this ASAP thank you

1)   

$$\\\frac{1-i}{3i}\times\frac{i}{i}=\frac{(1-i)i}{3i^2}=\frac{i-i^2}{3*-1}=
\frac{i--1}{-3}=\frac{i+1}{-3}=\frac{-1-i}{3}=-\frac{1}{3}-\frac{i}{3}$$

Thank you, Melody

$$t = \frac{5-b}{2}$$