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7 March, 00:46

Solve by extracting roots. Round your answers to two decimal places.

5a² - 85 = 2.2a² - 30

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  1. 7 March, 00:50
    0
    2.8a = 7.4

    Step-by-step explanation:

    5a² - 85 = 2.2a² - 30

    + 85 = + 85

    5a² = 2.2a² + 55

    - 2.2a² = - 2.2a²

    2.8a² = 55

    √2.8a² = √55

    2.8a = 7.4
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