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Shureka Washburn has score of 72,67,82, and 79 on her alebra test. Use an inequality to find the scores she must make on the final exam to pass the course with an average of 77 or higher, given that the final exam counts as two test.

Respuesta :

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72+67+82+79=300
300/4=75
300+81+81=462
462/6=77


ANSWER X MUST BE GREATER THAN OR EQUAL TO 81

Answer:

[tex]x \geq 81[/tex]

Step-by-step explanation:

Shureka Washburn has score of 72,67,82, and 79 on her algebra test.

Let x be the score on the final exam.

[tex]\frac{72+67+82+79+x+x}{6} \geq 77[/tex]

=>[tex]\frac{300+2x}{6} \geq 77[/tex]

=> [tex]300+2x \geq(77)6[/tex]

=> [tex]300+2x \geq 462[/tex]

=> [tex]2x \geq 462-300[/tex]

=> [tex]2x \geq 162[/tex]

=> [tex]x \geq 81[/tex]

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