#393**+8 **

@@ End of Day Wrap Tues 6 /1/15 Sydney, Australia Time 10:30pm ♪ ♫

Hello everyone,

Today our wonderful answerers were Happy7, CPhill, geno3141, NotTheBestMathMaster, Tetration, Shaniab29544 and Alan. Thank you all.

Here are a few interest posts. You probably have not waded through yesterday's yet :)

1) This is an old one but many people have been away on holidays and I'd really like people to read my new year's message. It is just intended as a thank you to you all.

This is the wrap address but it links to mine and Rosala's new year messages. :)

http://web2.0calc.com/questions/all-questions-answered-to-this-point#r390

2) I am still thinking about this area question

3 ) Imaginary numbers $$\sqrt[4]{-1}$$ I liked this one.

http://web2.0calc.com/questions/square-root-of-i

Thank you everyone - I really appreciate everything that you all do.

♫♪ ♪ ♫ ♬ ♬ MELODY ♬ ♬ ♫♪ ♪ ♫

Melody
Jan 6, 2015

#204**0 **

Wed 7/1/15

1) Another of Heureka's masterpeices Thanks Heureka.

http://web2.0calc.com/questions/sin-x-2-0145424-x

2) Some Physics Thanks Alan

3) This is a really good ratio and simultaneous equations question. Melody

http://web2.0calc.com/questions/ratio-pls-help-kinda-confuse-_

4) A simple play with imaginary numbers

http://web2.0calc.com/questions/why-is-root-3i-multiplied-by-root-3i-equal-to-3

5) Understanding logs. Two different approaches. Melody and CPhill

http://web2.0calc.com/questions/log-19-0-5-log-19-2-0-how-to-explain-this

6) A repeating question LOL

http://web2.0calc.com/questions/0-999-1

7) Solve for x Thanks Chris and Heureka

http://web2.0calc.com/questions/solve-for-x_11

8) Some basic calculus Thanks Heureka

http://web2.0calc.com/questions/ds-dt-t-3t-2-and-s-0-when-t-1

♫♪ ♪ ♫ ♬ ♬ MELODY ♬ ♬ ♫♪ ♪ ♫

Melody
Jan 6, 2015

#1**+5 **

Determine which of the points {(1,-2), (-1,2), (1,2), (-1,-2)}, if any are solutions to the systems of equations {x=4/5y-7 {2x+y=-1

I'll test (1,-2) x=1 and y=-2

x=4/5y-7 1=(4/5)*-2 -7 1=-8/5 -7 This is
If it had made the equations true then I would have tested (1,-2) in hte second equation to see if that was true. If they were both true then the point would have satisfied the system of equations. You can check th other points. |

Melody
Jan 6, 2015