Factor by grouping.7x2 + 19x - 6
A. (7x - 3)(x + 2)
B. (7x + 2)(x - 3)
C. (7x - 2)(x + 3)
D. (7x + 3)(x - 2)
Answer: C
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Calculate the arc length of the indicated portion of the curve r(t).r(t) = (9cos3 4t)j + (9sin3 4t)k; 
? ? t ? 
?
A. 0
B. 
C. 27
D. 
Answer the question.Graph the rectangle with vertices (1, 6), (4, 9), (6, 1), and ( 9, 4). Are the midpoints of the sides of the rectangle the vertices of a rectangle?
A. Yes B. No
Find the equation of the line satisfying the given conditions, giving it in slope-intercept form if possible.Through (-5, -7), perpendicular to x = 5
A. y = 5 B. x = 5 C. y = -7 D. y = 7
Use the elimination method by addition to find the solution for the following system.
A. x = -3, y = 2, z = 6 B. x = 3, y = 2, z = 7 C. x = 3, y = 7, z = 2 D. The system is inconsistent.