14trixie 14trixie

03-10-2021
Mathematics

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hi please i need the complete step-by-step solution for number 5. thank you ♥️

hi please i need the complete stepbystep solution for number 5 thank you class=

Respuesta :

cwrw238 cwrw238

03-10-2021

Answer:

m = 8.

Step-by-step explanation:

Arithmetic mean 18 = (12 + 3m)/2

Cross multiply:

12 + 3m = 36

3m = 36 - 12 = 24

m = 24/3 = 8.

Check this answer:

(3(8) + 12)/2

= (24 + 12)/2

= 36/2

= 18.

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