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March 24, 2017

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2(3y-4)^(3/5)-4=50

  • alg2trig - ,

    2(3y-4)^(3/5) = 54
    (3y-4)^(3/5) = 27

    3y - 4 = 27^(5/3)
    3y = 27^(5/3) + 4
    y = (27^(5/3) + 4)/3
    = (243 + 4)/3 = 247/3 or 82 1/3

  • alg2trig - ,

    1-(1/a)/1-(1/a^2)

  • alg2trig - ,

    multiply top and bottom by a^2 to get

    (a^2-a)/(a^2-1)
    = a(a-1)/(a+1)(a-1)
    = a/(a+1)

    or, since you seem to like reciprocals so much,

    1 /(1+1/a)

    :-)

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