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    andreasmom's Avatar
    andreasmom Posts: 1, Reputation: 1
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    #1

    Nov 7, 2008, 04:26 AM
    algebra 2 -exponents
    If 2^x + 2^x + 2^x + 2^x = 2^k, then what is k in terms of x?

    I need help with this concept!
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 7, 2008, 07:10 AM

    Note that this equation can be re-written as:

    4*2^x = 2^k

    Or:

    2^2 * 2^x = 2^k

    Now recall that a^b * a^c = a^(b+c) - use this concept and you should be able to take it from here.
    angel_92's Avatar
    angel_92 Posts: 2, Reputation: 1
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    #3

    Nov 12, 2008, 03:46 PM

    what is 7x-3y+6
    -2+5y=-10
    using elimination
    angel_92's Avatar
    angel_92 Posts: 2, Reputation: 1
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    #4

    Nov 12, 2008, 03:47 PM
    what is 7x-3y+6
    -2+5y=-10
    using elimination
    rebel-2's Avatar
    rebel-2 Posts: 107, Reputation: 8
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    #5

    Nov 18, 2008, 04:12 AM
    Delete.
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