Solve.The circle has a radius of 9y centimeters. Find its area. Do not approximate ?. 
A. 18y2? sq cm
B. 18y? sq cm
C. 81y2? sq cm
D. 81y? sq cm
Answer: C
Mathematics
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Solve.
+ 
= 
A. -7, 1 B. 1 C. 7, 1 D. -7, -1
Mathematics
Find the range of the quadratic function.f(x) = x2 - 12x - 8
A. [-6, ?) B. (-?, -116] C. [-44, ?) D. (-?, -44]
Mathematics
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 triple, if possible.
A. (23 + 12z, -14 - 4z, z) 
B. (23 + 11z, -7 - 4z, z) 
C. (23 + 11z, -14 - 4z, z) 
D. No solution
Mathematics
Find the standard form of the equation of the hyperbola with the given characteristics and center at the origin.
?
Vertices: 
; asymptotes: 
?
A. 
B. 
C. 
D. 
E. 
Mathematics