Ask Experts Questions for FREE Help !
Ask
    Adderb's Avatar
    Adderb Posts: 11, Reputation: 1
    New Member
     
    #1

    Jan 20, 2007, 12:13 PM
    Substitution problem that has me confused!
    5s + 10t = 3
    2s + 1t = 0

    Any help is appreciated!:confused:
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #2

    Jan 20, 2007, 12:29 PM
    from your second equation, t = -2s

    put this into your first one and then solve for s. use your value for s to find t.

    let me know how you get on!
    Adderb's Avatar
    Adderb Posts: 11, Reputation: 1
    New Member
     
    #3

    Jan 20, 2007, 12:36 PM
    Quote Originally Posted by Adderb
    5s + 10t = 3
    2s + 1t = 0

    Any help is appreciated!:confused:
    I did the problem and came up with S= -1/5.. What did I do wrong?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #4

    Jan 20, 2007, 01:10 PM
    Why can't s be -1/5?

    What do you get for t?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #5

    Jan 20, 2007, 01:13 PM
    s = -1/5 looks right to me
    Now work out t.
    Adderb's Avatar
    Adderb Posts: 11, Reputation: 1
    New Member
     
    #6

    Jan 20, 2007, 01:52 PM
    Quote Originally Posted by Adderb
    5s + 10t = 3
    2s + 1t = 0

    Any help is appreciated!:confused:
    So if S= -1/5 and t =-2s, you have to still solve for the t
    I got t = 2/3
    Is this correct?
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
    Junior Member
     
    #7

    Jan 20, 2007, 01:56 PM
    s = -1/5 is correct! If your book says a different answer than the book is incorrect. Answers books have mistakes in them at times and I talk from experience.
    Anyhow plugging in s = -1/5 into one of your equations should get you t = 2/5
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #8

    Jan 20, 2007, 01:59 PM
    I assume you typed 2/3 wrong, everything else you said is correct
    Adderb's Avatar
    Adderb Posts: 11, Reputation: 1
    New Member
     
    #9

    Jan 20, 2007, 02:04 PM
    Quote Originally Posted by Adderb
    5s + 10t = 3
    2s + 1t = 0

    Any help is appreciated!:confused:
    I did type that wrong... Thanks for all your help!
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #10

    Jan 20, 2007, 02:26 PM
    Don't mention it! ;)

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search


Check out some similar questions!

Algebra Ii (elimination & Substitution) [ 8 Answers ]

solve by elemination {x + y = 10 x - y = 2 solve by substitution y = x +1 2x + y = 7

Substitution method problem [ 5 Answers ]

2a - 3b = -13 -b = -2a - 7 Help?

Confused. Help. [ 6 Answers ]

I've been "talking" to this guy recently and everything was going really good. He told me that he thought things were really going somewhere and things were different with me and that he really liked me a lot. We hungout almost everyday for about a week. Then we didn't talk for about 3 days. Then...

Confused... [ 2 Answers ]

My husband and I are expecting our first child. He seems excited about it like when he brought me flowers when we found out it was a boy. But then at times he is hard to read. For example he doesn't care to feel the baby move and he recently told me that he is not fascinated with my stomach(which...

Substitution [ 2 Answers ]

What is substitution?


View more questions Search