Solve the quadratic inequality. Graph the solution.-3x2 + 3x - 5 ? 0
A. 
B. no solution
C. (-?,?)
D. 
Answer: C
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Solve the problem.A tank initially contains 100 gal of brine in which 40 lb of salt are dissolved. A brine containing 
of salt runs into the tank at the rate of 4 gal/min. The mixture is kept uniform by stirring and flows out of the tank at the rate of 3 gal/min. Find the solution to the differential equation that models the mixing process.
A. y = 2(100 + t) - 
B. y = 2(100 + t) - 
C. y = 4(50 + t) - 
D. y = 4(50 + t) - 
Provide an appropriate response.Find the average of 76, 70, 62, 66, and 76.
A. 69 B. 76 C. 62 D. 70
Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.cos 50° sec 50°
A. 1 B. 50 C. -1 D. 0
Find the solution to the system of equations by substitution. 3x + y = 0-3x + y = -6
A. (-1, -3) B. (-1, 3) C. (1, 6) D. (1, -3)