Find the vertex of the parabola.f(x) = - 
x2 + 7x - 6
A. 
B. (21, -6)
C. (-21, -300)
D. 
Answer: D
Mathematics
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Given matrix A, find the indicated cofactor.Find A21.A = 
A. -11 B. 11 C. 2 D. -2
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Given the points (-6, -8) and (4, -6). Find a third point so that the three points form the vertices of a right triangle. ?
A. (-16, 4) B. (-11, 17) C. (-6, -9) D. (5, -6) E. (4, 6)
Mathematics
Find the largest open interval where the function is changing as requested.Increasing f(x) = 
A. (0, ?) B. (-?, 0) C. (1, ?) D. (-?, 1)
Mathematics
Determine whether the graph is the graph of a function.
A. Yes B. No
Mathematics