Graph.f(x) = 2x - 6
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.Newton's Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. Suppose that a coffee is served at a temperature of 150°F and placed in a room whose temperature is 70°F. The temperature ? (in °F) of the coffee at time t (in minutes) can be modeled by ?(t) = 70 + 80e-0.06t. When will the temperature be 105°F?
A. 13.8 minutes B. 6.9 minutes C. 5.9 minutes D. 6.2 minutes
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, -8) and (0, 8)
vertices at (0, -64), (0, 64)
B. center at (0, 0)
foci at (0, 8) and (7, 0)
vertices at (0, 64), (49, 0)
C. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-8, 0), (8, 0)
D. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -8), (0, 8)
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.-7x + 9y = -14 3x - 6y = 6
A. (2, 1) B. (1, 1) C. (2, 0) D. No solution
Determine the domain of f.f(x) = 
A. (-?, 0) ? (0, ?) B. [0, ?) C. (-?, ?) D. (-?, 0]