Factor out the greatest common factor. Simplify the factors, if possible.(x - 4)(x + 5) + (x - 4)(x + 5)
A. (x - 4)(x + 10)
B. (x - 4)(2x + 10)
C. 2(x - 4)(x + 5)
D. 2(x - 4)(2x + 10)
Answer: C
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Solve the problem.The Little Town Arts Center charges $20 for adults, $15 for senior citizens, and $9 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 891 tickets sold. There were 48 more children than adults. How many children attended?
A. 287 children B. 278 children C. 326 children D. 316 children
Find the derivative of y with respect to x, t, or ?, as appropriate.y = ln(x - 2)
A. 
B. 
C. - 
D. 
Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by the triangle with vertices (3, 0), (3, 2), (5, 2)
A. 
?
B. 
?
C. 
?
D. 
?
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered pair, if possible.
A. (5, 4) B. No solution C. (6, 6) D. (7, 6)