Question

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:

Answer 1

Answer:

x ≥ 83

Step-by-step explanation:

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

Let the score for the fourth test be x

`\begin{gathered} \text{Average = }(79+81+77+x)/(4) \\ \text{Average = }(237+x)/(4) \end{gathered}`

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

That is, average ≥ 80

`\begin{gathered} (237+x)/(4)\ge80 \\ 237+x\ge4(80) \\ 237+x\ge320 \\ x\ge320-237 \\ x\ge83 \end{gathered}`

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