Algebra Demystified 2nd Ed

451

Final Exam

1. Brooklyn’s grade in her accounting class is based on four tests and a final
   exam. The final exam counts twice as much as a regular test. Brooklyn’s
   test grades are 82, 91, 86, and 89. What must she make on the final exam
   to receive a course grade of 90?
   A. 96 B. 98 C. 100 D. She would need a grade higher than 100.


2. If 52 321
   2

()xx−− − 12 x 5









=+, then

A. x=^187 B. x=^227 C. x=^107 D. x=^3

3. x
   x

−

−

(^8) =
(^264)
A. x^1 − 8 B. 1
x+ 8
C. x
x− 8
D. x
x
−
−
8
(^264)
cannot be simplified.

4. ()5x^43 =
   A. 5 x^7 B. 5 x^12 C. 125 x^7 D. 125 x^12


5. A rectangle’s length is 3 m longer than its width. The area is 180 m^2. How
   long is the rectangle?
   A. 12 m B. 13 m C. 14 m D. 15 m