zorahbgirl zorahbgirl

15-12-2018
Mathematics

contestada

21=3r squared how do I solve that?

Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

15-12-2018

Answer:

±sqrt(7) = r

Step-by-step explanation:

21 = 3r^2

Divide each side by 3

21/3 = 3r^2/3

7 = r^2

Take the square root of each side

±sqrt(7) = sqrt(r^2)

±sqrt(7) = r

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