jay47374
jay47374 jay47374
  • 04-06-2019
  • Mathematics
contestada

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

5a² - 85 = 2.2a² - 30

Respuesta :

Desmariesin
Desmariesin Desmariesin
  • 04-06-2019

Answer:

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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