CodeOptimist Posted March 12, 2004 Share Posted March 12, 2004 I thought it'd be fun to start a thread with some simple math examples to figure out! Whoever gets the answer can ask the next question.First example:Solve:x + 5 = -(x + 3) Link to comment Share on other sites More sharing options...
King Tutankhamun Posted March 12, 2004 Share Posted March 12, 2004 Should we show our work? x+5 = -x-3 -5 -5+x +x2x = -8/2 /2x = -4 Next one: what is square root of 68 in radical form? (use '|' to show sq root) Link to comment Share on other sites More sharing options...
chichigrande Posted March 13, 2004 Share Posted March 13, 2004 2l7If a rectangle has a length of 8 and a width of 6, how long is the diagnol? Link to comment Share on other sites More sharing options...
Sam Posted March 13, 2004 Share Posted March 13, 2004 A2 + B2 = C26^2 + 8^2 =C236 + 64 =C2 100=C2|100= 10Someone else ask one... Link to comment Share on other sites More sharing options...
CodeOptimist Posted March 13, 2004 Author Share Posted March 13, 2004 What is the area of a half-circle with a radius of 8? Link to comment Share on other sites More sharing options...
Sam Posted March 13, 2004 Share Posted March 13, 2004 .5(3.14)(8^2)1.57(69)=100.53not sure if that is right Link to comment Share on other sites More sharing options...
chichigrande Posted March 13, 2004 Share Posted March 13, 2004 3.14(8^2)/2I got 100.48 Link to comment Share on other sites More sharing options...
CodeOptimist Posted March 13, 2004 Author Share Posted March 13, 2004 100.48 is correct, you're up Matt Link to comment Share on other sites More sharing options...
King Tutankhamun Posted March 15, 2004 Share Posted March 15, 2004 Since Matt didn't ask one, I will.Solve the proportion:3 = x - -4 100 Link to comment Share on other sites More sharing options...
Sam Posted March 15, 2004 Share Posted March 15, 2004 easy 75 Link to comment Share on other sites More sharing options...
King Tutankhamun Posted March 15, 2004 Share Posted March 15, 2004 Bing Bing.You can ask the next one. Link to comment Share on other sites More sharing options...
tripled Posted March 16, 2004 Share Posted March 16, 2004 what aboutsqr(sin x) + sqr(cos x) Link to comment Share on other sites More sharing options...
Curufinwe Posted March 16, 2004 Share Posted March 16, 2004 cos²x + sin²x = 1mine now f'(ln x) = ?????? Link to comment Share on other sites More sharing options...
CodeOptimist Posted March 16, 2004 Author Share Posted March 16, 2004 Ehh, the title reads *Simple* practice problems ;) Link to comment Share on other sites More sharing options...
DarkAngelBGE Posted March 16, 2004 Share Posted March 16, 2004 What is the function ln x ? Link to comment Share on other sites More sharing options...
Tonto_Icy_Tripod Posted March 16, 2004 Share Posted March 16, 2004 not everyone's doing logs yet yknow Link to comment Share on other sites More sharing options...
tripled Posted March 16, 2004 Share Posted March 16, 2004 @timbo:i think:log e xbut especially you should know better timbo Link to comment Share on other sites More sharing options...
Curufinwe Posted March 16, 2004 Share Posted March 16, 2004 Aye, sorry ... I thought most of you guys were in College, University or at least last year High School ...the answer was 1/xAnyway, a simpler one :(4-9)x(9+4) = ????? Link to comment Share on other sites More sharing options...
tripled Posted March 16, 2004 Share Posted March 16, 2004 -65we aren't in university,but we also don't visit the first classthat task is really too sinple Link to comment Share on other sites More sharing options...
Curufinwe Posted March 16, 2004 Share Posted March 16, 2004 sorry again, I just wanted you to use the property (a-(a+ ... but I mixed things ... and I wrote 2 digits ... I wanted to write actually :(4-x)(x+4) = ??? Link to comment Share on other sites More sharing options...
tripled Posted March 16, 2004 Share Posted March 16, 2004 no prob,sqr(x) - 16 Link to comment Share on other sites More sharing options...
Curufinwe Posted March 16, 2004 Share Posted March 16, 2004 no sorry, that is not right ... start again ... Link to comment Share on other sites More sharing options...
tripled Posted March 16, 2004 Share Posted March 16, 2004 oh @#$%! answered too fast, without thinking16 - sqr(x) Link to comment Share on other sites More sharing options...
DarkAngelBGE Posted March 16, 2004 Share Posted March 16, 2004 Oh I did logs long ago. Just need to be reminded of ln. Link to comment Share on other sites More sharing options...
DarkAngelBGE Posted March 16, 2004 Share Posted March 16, 2004 Curu, you sure you didn't want to ask: (x-4)(x+4) ? Link to comment Share on other sites More sharing options...
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