Perform the indicated subtraction.4 - (-21)
A. -17
B. 17
C. 25
D. -25
Answer: C
Mathematics
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Find the composite function for the given functions and state the domain. f ? g for f(x) = 
x and g(x) = - 
x
A. -x B. x C. 0 D. 1
Mathematics
Eliminate the parameter to obtain a Cartesian equation of the curve.x = 2 tan t, y = 5 sec t, 0 ? t ? 2?
A. 
- 
= 1, -? < x < ?
B. y = x2 - 9, -3 ? x ? 3
C. y = 5
, -? < x < ?
D. 
+ 
= 1, -? < x < ?
Mathematics
Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = -2x2 - 20x - 53 
A. vertex (-5, -3)
intercept (0, -53)
B. vertex (5, -3)
intercept 
C. vertex (-5, -3)
intercept 
D. vertex (5, -3)
intercept (0, -53)
Mathematics
Solve the inequality analytically. Support the answer graphically. Give exact values for endpoints.x2 - 4x - 5 ? 0
A. (-?, -1] ? [5, ?) B. [-1, 5] C. (-?, -1] D. [5, ?)
Mathematics