Use a graphing calculator to find the real solutions of x³-4x²-53x+168=0.
a. x = 3, -7, 8
Mathematics
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Solve the problem.Find the second derivative of the the function 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The radiator in a certain make of car needs to contain 
of 40% antifreeze. The radiator now contains 
of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
A. 15.0 L B. 24 L C. 20.0 L D. 30 L
Mathematics
Solve the equation. Express radicals in simplest form.4x2 + 12x = -6
A. 
B. 
C. 
D. 
Mathematics
Write the number as a product of a real number and i. Simplify the radical expression.
A. -4i
B. 4
C. 4i
D. -4
Mathematics