Divide and simplify. Assume that all expressions under radicals represent positive numbers.
A. 4
B. 4fg
C. 4
D. 
Answer: C
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Sketch the graph of the function and find the domain and range.f(x) = -x2 - 3
A. domain: all real numbers
range: y ? 3
B. domain: all real numbers
range: y ? -3
C. domain: x ? -3
range: y ? 0
D. domain: all real numbers
range: y ? -3
For the given function, find the indicated function value, if it exists. If the value does not exist, answer "Does not exist".For f(x) = 
, find f(-126).
A. -6 B. Does not exist C. -5 D. 5
Perform the indicated operation.[(1.8x3 + 7.6x2 + 4.1) + (6.5x - 2.9)] - (3.7x2 -x - 9.5)
A. 1.8x3 + 3.9x2 + 7.5x + 10.7 B. 1.8x3 + 3.9x2 + 6.5x + 10.7 C. 1.8x3 + 11.3x2 + 5.5x - 8.3 D. 13.2x6 + 10.7
Find an equation of variation for the given situation.y varies jointly as x and z, and y = 91 when x = 5.2 and z = 7
A. y = 5.5xz
B. y = 0.25xz
C. y = 
D. y = 2.5xz