Use the discriminant to determine the number and nature of the solutions to the quadratic equation. Do not solve the equation.2x2 + 6x - 3 = 0
A. two nonreal solutions
B. two real solutions
C. exactly one real solution
Answer: B
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Calculate the area of the surface S.S is the portion of the cylinder x2 + y2 = 1 that lies between z = 3 and z = 6.
A. 3? B. 9? C. 18? D. 6?
Determine the validity of the argument.Football and studying don't mix.Don is a football player.Therefore Don does not study.
A. Not valid B. Valid
Solve.When making a telephone call using a calling card, a call lasting 6 minutes cost $1.70. A call lasting 13 minutes cost $3.10. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of making a call lasting x minutes.
A. y = -0.2x + 2.9
B. y = 0.2x - 9.9
C. y = 0.2x + 0.5
D. y = 5x - 
Solve the problem.An airline decides to reduce ticket prices by x dollars form the current price of $907. (i) Write a polynomial that gives the new price after the x-dollar deduction. (ii) The revenue is the number of tickets sold times the price of each ticket. If 50 tickets were sold when the price was $907 and 30 additional tickets are sold for each dollar the price is reduced, write a polynomial that gives the revenue in terms of x when the original price is reduced by x dollars.
A. (i) -x + 907 (ii) -30x2 + 27,210x + 45,350 B. (i) -x + 907 (ii) 30x2 - 27,210x + 45,350 C. (i) -x - 907 (ii) -30x2 - 45,350x + 27,210 D. (i) -x - 907 (ii) 30x2 + 45,350x + 27,210