Factor by grouping.x3 - 5x2 + 3x - 15
A. (x - 15)(x2 - 5x + 3)
B. (x - 5)(x2 + 3)
C. (x - 5)(x2 + 5)
D. (x + 5)(x2 + 3)
Answer: B
Mathematics
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Find the area enclosed by the given curves.Find the area of the region in the first quadrant bounded by the line y = 8x, the line x = 1, the curve 
and the x-axis.
A. 
B. 
C. 
D. 6
Mathematics
Solve.
= 
+ 4
A. -120 B. 120 C. -60 D. 60
Mathematics
Find the common difference for the arithmetic sequence.-7, -11, -15, -19, . . .
A. -4 B. -8 C. -12 D. -8.6
Mathematics
Solve the problem.Students in a math class took a final exam. They took equivalent forms of the exam in monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by 
.Find S'(t).
A. S'(t) = 77 - 
B. S'(t) = - 
C. S'(t) = - 19 ln 
D. S'(t) = 
Mathematics