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16 July, 15:12

Solve 5x - 4 = 7 for x using the change of base formula log base b of y equals log y over log b.

A 5.209

B 4.827

C - 2.791

D - 3.173

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Answers (1)
  1. 16 July, 15:22
    0
    5.209 or A

    Step-by-step explanation

    5^x-4=7

    reserve 4

    log sides

    x-4 log5 and log7

    x-4=log7/log5

    +4 or number of your equation

    x=log5/log7 + 4

    use calculator

    get answer

    5.209

    EDIT: Got a 100 on the test this is correct
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