Solve the problem.The area of the rectangle is represented by y2 - 4y - 21. What is the length?
A. y + 3
B. y - 3
C. y + 7
D. y - 7
Answer: D
Mathematics
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Rationalize the denominator. Assume all variables represent positive numbers.
A. 
B. 
C. 
D. 
Mathematics
Find the center and the radius of the circle.x2 + y2 - 14x - 18y = 0
A. (7, 9); r = 
B. (7, 0); r = 
C. (8, 9); r = 
D. (7, 9); r = 
Mathematics
Solve the problem.Find an equation of the form 
that describes the outline of a satellite dish such that the bottom of the dish passes through (0, 0), the diameter of the dish is 32 inches, and the depth of the dish is 7 inches
A. y = 
x2
B. y = 
x2
C. y = 
x2
D. y = 
x2
Mathematics
For the given function f(x), find f-1(x).f(x) = 
A. f-1(x) = 
B. Not one-to-one
C. f-1(x) = 
D. f-1(x) = 
Mathematics