Solve the system by substitution. x + 7y = 27 6x + 7y = 57
A. ?
B. {(7, 2)}
C. {(6, 3)}
D. {(-3, 6)}
Answer: C
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Solve the problem.A plate shaped like an equilateral triangle 1 m on a side is placed on a vertical wall 2 m below the surface of a pool filled with water. On which plate in the figure is the force greater? Try to anticipate the answer and then compute the force on each plate. Round to three decimal places when appropriate. 
A. plate 2 plate 1: 4856.024 N plate 2: 5468.524 N B. plate 1 plate 1: 10,937.049 N plate 2: 9712.049 N C. plate 2 plate 1: 9712.049 N plate 2: 10,937.049 N D. plate 1 plate 1: 5468.524 N plate 2: 4856.024 N
Find the equation of the transverse axis of the hyperbola.x2 - 
= 1
A. y = 
x
B. x = 0 (y-axis)
C. y = 0 (x-axis)
D. y = 4x
Solve the equation.6x(x + 5) = 0
A. 
, 5
B. -5, 0
C. 0, 5
D. -5, 
Solve the problem.Assume that the temperature T of a person during a certain illness is given by 
where T = the temperature (°F) at time t, in days. Find the maximum value of the temperature and when it occurs. Round your answer to the nearest tenth, if necessary.
A. 101.2°F at 6 days B. 102.2°F at 6 days C. 102.2°F at 3.6 days D. 100.9°F at 4.8 days