Question 39 Answer and Explanation _ACT June 2005 Form 61D Math Section

Use the following information to answer questions 39-41.

Ms. Martín uses a computer program to produce periodic progress reports for the 10 students in her Advanced Mathematics Ⅱ class. The report gives a student's scores on tests, quizzes, and homework assignments and the average of all 10 students' scores on each. The progress report shown below was produced near the end of the term for Richard Baldwin.

39. The solution of which of the following inequalities would tell Richard the minimum score (represented by x) he needs to earn on Quiz #4 in order to have a quiz.average of at least 90?

A. $\frac{85+93+89+x}{4}\geq90$

B. $\frac{x-(85+93+89)}{4}\geq90$

C. $\frac{85+93+89+x}{3}\geq90$

D. $\frac{85+93+89+x}{2}\geq90$

E. $\frac{\frac{85+93+89}{3}+x}{2}\geq90$

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation