Find the center and the radius of the circle.x2 + y2 - 2x - 8y + 9 = 0
A. center (1, 4), radius = 2
B. center (-1, -4), radius = 2
C. center (-1, -4), radius = 8
D. center (1, 4), radius = 8
Answer: A
Mathematics
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Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.f'(x) = x1/3(x - 7)
A. Decreasing on (0, 7); increasing on (7, ?) B. Decreasing on (0, 7); increasing on (-?, 0) ? (7, ?) C. Decreasing on (-?, 0) ? (7, ?); increasing on (0, 7) D. Increasing on (0, ?)
Mathematics
Simplify. Express the final answer in exponential form.
4
6
A. 
10
B. 
10
C. 
24
D. 
24
Mathematics
Multiply. Write the answer in lowest terms.
? 
? 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression for x = -2, y = 3, and z = -4. Make sure you simplify.-9x - 6y - 2z
A. -7 B. 22 C. 8 D. 36
Mathematics