Evaluate f(x) at the given value of x.f(x) = x2 + 3; x = 9
A. 84
B. 81
C. 80
D. 86
Answer: A
Mathematics
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Graph the exponential function.y = 3x 
A. 
B. 
C. 
D. 
Mathematics
Find an equation for the ellipse described.Focus at (-2, 0); vertices at (-8, 0) and (8, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Find the real or imaginary solutions by completing the square.2x2 - 4x - 6 = 0
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated elementary row operations.R13
A. 
B. 
C. 
D. 
Mathematics