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  • 06-02-2019
  • Mathematics
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math please help 10 points!

math please help 10 points class=

Respuesta :

anthoniia anthoniia
  • 07-02-2019

Answer:


Step-by-step explanation:

[tex]average= \frac{sum of scores}{number of tests}[/tex]

[tex]80= \frac{79+81+77+x}{4}[/tex]

80 x 4 = 79+81+77+x

320=237  + x

320-237 = x

83=x

so Marianne must score 83 points or higher on her last test

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