@@ 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 ♬ ♬ ♫♪ ♪ ♫
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 ♬ ♬ ♫♪ ♪ ♫
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 not true so (1,-2) does not satisfy this system of equations.
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. |