Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log4(x + 5) + log4(x - 1) = 2
A. {3}
B. {4}
C. {-7}
D. {3, -7}
Answer: A
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Find the foci of the given hyperbola.25x2 - y2 = 25
A. (0, 
), (0, -
)
B. (
, 0), (-
, 0)
C. (0, 5), (0, -5)
D. (5, 0), (-5, 0)
Find parametric equations (not unique) for the circle (give an interval for the parameter values) and find a description in terms of x and y.a circle centered at the origin with radius 5, generated counterclockwise
A. x = 5 sin t, y = 5 cos t, for 
< t < 
; x2 + y2 = 25
B. x = 5 cos t, y = 5 sin t, for 0 < t < 2?; x2 + y2 = 5
C. x = 5 sin t, y = 5 cos t, for 
< t < 
; x2 + y2 = 5
D. x = 5 cos t, y = 5 sin t, for 0 < t < 2?; x2 + y2 = 25
Find a unit vector in the direction of u.
u = 
A. 
B. 
C. 
D. 
E. 
Use the quadratic formula to solve the equation. If the equation has no real number solution, so state.x2 + 2x - 120 = 0
A. x = -12, x = 10 B. x = -12, x = 1 C. x = -10, x = 12 D. x = 12, x = 10