Determine the phase shift of the function.y = 4 cos (2x + ?)
A. 
units to the left
B. 2? units to the right
C. 
units to the left
D. 4? units to the right
Answer: A
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Write the solution set to the inequality in interval notation.x < -15
A. (-?, -15) B. [-15, ?) C. (-15, ?) D. (-?, -15]
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 5x + 4y = 86x - 3y = 33
A. (-4, 3) B. (3, -4) C. (4, -3) D. (-3, 4)
Write true or false for the statement.A right triangle has one angle of 90°.
A. True B. False
Solve.The relationship between Fahrenheit temperature and Celsius temperature can be approximated by an equation of the form 
where x is the temperature in degrees Fahrenheit and y is the temperature in degrees Celsius. Find the equation if two ordered pairs that satisfy it are 
and 
A. y = 
x + 
B. y = 
x - 80
C. y = 
x - 10
D. y = 
x - 