Answered

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4) At Yeber Middle School, Marianne must score an average of at least 80 points on 4 tests before she canapply for a scholarship. If she scored 79, 81, and 77 for the first three tests, what must she score on herlast test?Let x =Inequality:

Sagot :

Answer:

x ≥ 83

Explanation:

Scores for the first three tests are 79, 81, and 77

Let the score for the fourth test be x

[tex]\begin{gathered} \text{Average = }\frac{79+81+77+x}{4} \\ \text{Average = }\frac{237+x}{4} \end{gathered}[/tex]

Marianne must score an average of at least 80 points on 4 tests before she can apply for a scholarship

That is, average ≥ 80

[tex]\begin{gathered} \frac{237+x}{4}\ge80 \\ 237+x\ge4(80) \\ 237+x\ge320 \\ x\ge320-237 \\ x\ge83 \end{gathered}[/tex]

Marianne score in her last test must be represented by x ≥ 83

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