For what value of y does 125=(1/25)^y-1

Question

For what value of y does 125=(1/25)^y-1

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Melody 1 month 2021-10-23T14:42:06+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-10-23T14:43:06+00:00

    Answer:y=-1/2

    Step-by-step explanation:

    125=(1/25)^(y-1)

    5^3=(5^(-2))^(y-1)

    5^3=5^(-2(y-1))

    The same base eliminate each other we then have

    3=-2(y-1)

    3=-2y+2

    Collect like terms

    2y=2-3

    2y=-1

    Divide both sides by 2

    2y/2=-1/2

    y=-1/2

    0
    2021-10-23T14:43:32+00:00

    Answer:

    D. -1/2

    Step-by-step explanation:

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45:7+7-4:2-5:5*4+35:2 =? ( )