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thinkfast January 19th, 2012 12:56 AM

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 Saturnís
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?

greg1313 January 19th, 2012 01:30 AM

Re: Text exercise
 
Quote:

Does it mean I'm not for math?
No, it does not mean that.

The distance to Mars is (743 - 29)/21 = 34 million miles. Do you see how I got the expression on the left-hand side of that equation?

thinkfast January 19th, 2012 03:20 AM

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.

greg1313 January 19th, 2012 03:23 AM

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?

den99 January 19th, 2012 04:07 AM

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.

greg1313 January 19th, 2012 04:09 AM

Re: Text exercise
 
You're welcome. Good luck with your studies. (your English seems pretty good, by the way).

thinkfast January 19th, 2012 04:40 AM

Re: Text exercise
 
What about "Twice the second is eight more" what about 8 ?

greg1313 January 19th, 2012 06:43 AM

Re: Text exercise
 
3a + 2(a + 2) = 4(a + 4) + 8

MarkFL January 21st, 2012 01:01 AM

Re: Text exercise
 
See this topic for your other question.


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