January 18th, 2012, 11:56 PM  #1 
Member Joined: Jan 2012 Posts: 33 Thanks: 0  Text exercise
The Mars rover Spirit landed on January 3, 2004. Just over 1 yr later, on January 14, 2005, the Huygens probe landed on Titan (one of Saturn’s moons). At their closest approach, the distance from the Earth to Saturn is 29 million mi more than 21 times the distance from the Earth to Mars. If the distance to Saturn is 743 million mi, what is the distance to Mars? Can somebody give me an answer? I have few answers but I want to be sure. I understand equations and etc. but when it comes to text exercises I don't understand them...Does it mean I'm not for math? 
January 19th, 2012, 12:30 AM  #2  
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond  Re: Text exercise Quote:
The distance to Mars is (743  29)/21 = 34 million miles. Do you see how I got the expression on the lefthand side of that equation?  
January 19th, 2012, 02:20 AM  #3 
Member Joined: Jan 2012 Posts: 33 Thanks: 0  Re: Text exercise
Thank you for the answer. I hope someday I'll do math like you Could you help with the last one? Find three consecutive even integers where the sum of triple the first and twice the second is eight more than four times the third. The English is the second my language. I know English well, but I need to get used to this kind of exercises. In my language there are no good books about math. 
January 19th, 2012, 02:23 AM  #4 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond  Re: Text exercise
Here's a start: 3a + 2(a + 2) = 4(a + 4) + 8. Do you see I arrived at that? What is your first language? 
January 19th, 2012, 03:07 AM  #5 
Newbie Joined: Jan 2012 Posts: 3 Thanks: 0  Re: Text exercise
My first language is Lithuanian. Well I'll need to try harder to learn math, I hope I'll learn it someday And thank you for your answer. Very helpful forum. 
January 19th, 2012, 03:09 AM  #6 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond  Re: Text exercise
You're welcome. Good luck with your studies. (your English seems pretty good, by the way).

January 19th, 2012, 03:40 AM  #7 
Member Joined: Jan 2012 Posts: 33 Thanks: 0  Re: Text exercise
What about "Twice the second is eight more" what about 8 ?

January 19th, 2012, 05:43 AM  #8 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond  Re: Text exercise
3a + 2(a + 2) = 4(a + 4) + 8 
January 21st, 2012, 12:01 AM  #9 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: Text exercise
See this topic for your other question.


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