Factor the expression completely.
m
- 
m
(conservation of energy)
A. 
(mvi + mvf) (vi - vf)
B. Cannot be factored.
C. 
m(vi + vf) (vi - vf)
D. 
(mvi + vf) (vi - mvf)
Answer: C
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Factor by grouping.72 - 9t - 8p + tp
A. (8 - t)(9 + p) B. (8 + t)(9 - p) C. (8 - t)(9 - p) D. (8 + t)(9 + p)
The number of cars sold weekly by a new automobile dealership grows according to a linear growth model. The first week the dealership sold two cars (P0 = 2). The second week the dealership sold six cars (P1 = 6).If PN denotes the number of cars sold in the Nth week, then
A. PN = 4N + 2. B. PN = N2 + N. C. PN = 2N + 4. D. PN = 4N - 2. E. none of these
Write the equation in standard form for an ellipse centered at (h, k). Identify the center and the vertices.4x2 - 20x + 16y2 + 16y + 25 = 0
A. C
; V
; 
+ 
= 1
B. C
; V
; 
+ 
= 1
C. C
; V
; 
+ 
= 1
D. C
; V
; 
+ 
= 1
Determine the inequality which matches the calculator graph. Do not use your calculator. Instead, use your knowledge of the concepts involved in graphing inequalities.
A. y ? x B. y ? -x C. y ? x D. y ? -x