Reference no: EM13925865

Practice Pre-exam on Background Concepts - Solutions
Dr. Stanley D. Longhofer
Multiple-Choice / True-False Questions - 2 points each
______ 1. Solve the following expression for ??: ??=(3??-4)/5.
A. ??=(5??-4)/3
B. ??=(3??-4)/5
C. ??=(4??+3)/5
D. ??=(????+??)/??
E. ??=(??+5)/3-4

______ 2. What is the relationship between x and y in this function?
A. THEY MOVE IN THE SAME DIRECTION.
B. They move in opposite directions from one another.
C. There is no connection between x and y in this function.
D. There is not enough information to answer this question.

______ 3. Solve the following expression for y: ????=??2-????.
A. ??=(??2-????)/??
B. ??=??2/(??-??)
C. ??=????/(??+??)
D. ??=(??+??)??
E. ??=(??-??)??

______ 4. The grading scale for a particular class incorporates the following weights:
? Midterm exam = 30% of your final grade
? Final exam = 40% of your final grade
? Homework assignments = 15% of your final grade
? Project = 15% of your final grade
If you score 85 on the midterm exam, 75 on the final exam, 100 on the homework assignments and 95 on the project, what will be your overall score in this class?
A. 88.75
B. 84.75
C. 90.00
D. 95.25
E. None of the above; the correct answer is __________.
Score = 85 × 0.30 + 75 × 0.40 + 100 × 0.15 + 95 × 0.15 = 84.75
Practice Pre-Exam on Background Concepts - Solutions

______ 5. Which of the following graphs depicts the function ??=(??-5)2?
Graph C. Notice that the ??=0 when ??=5 and posit