Find the domain of the function f(x) = 2x 2 + 4x – 5.
a. All real numbers x such that x > 0
b. All real numbers x
c. All real numbers x such that x < 0
d. Non-negative real numbers x
b. All real numbers x
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Write the equation of the line passing through the given points. Write your answer in slope-intercept form.Passing through (-7, 4) and (-4, 8)
A. y = 
x + 
B. y = - 
x + 
C. y = 
x + 
D. y = - 
x + 
Use the definition of equality of complex numbers to find the real numbers x and y such that the equation is true.6 + yi = x + 
A. x = 6, y = -10 B. x = -6, y = -10 C. x = -6, y = 10 D. x = 6, y = 10
Evaluate the indefinite integral.
A. 3t3/2 + 
t5/2 + C
B. 
t3/2 + 
t5/2 + C
C. 
t3/2 + 
t2 + C
D. 2t3/2 + t5/2 + C
Solve the problem.The ratio of the lengths of strings that play the notes D and B is 27 to 16. If a string 64 cm long plays a B, what is the length of the string that plays a D?
A. 64 cm B. 91 cm C. 80 cm D. 108 cm