Solve the problem.Devon purchased tickets to an air show for 7 adults and 2 children. The total cost was 
. The cost of a child's ticket was 
less than the cost of an adult's ticket. Find the price of an adult's ticket and a child's ticket.
A. adult's ticket: $20; child's ticket: $14
B. adult's ticket: $18; child's ticket: $12
C. adult's ticket: $17; child's ticket: $11
D. adult's ticket: $19; child's ticket: $13
Answer: B
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Solve the problem.The position (in centimeters) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's acceleration at time t.
A. a = - A sin 
cm/sec2
B. a = - A
sin 
cm/sec2
C. a = - 
sin 
cm/sec2
D. a = 
cos 
cm/sec2
Factor the polynomial completely using grouping.4x2 + 12x + 9
A. (4x + 3)(x + 3) B. (2x - 3)(2x - 3) C. (2x + 3)(2x + 3) D. prime
Express the graph shown using interval notation. Also express it as an inequality involving x.
A. (-4, 2) -4 < x < 2 B. (-4, 2] -4 < x ? 2 C. [-4, 2) -4 ? x < 2 D. [-4, 2] -4 ? x ? 2
Factor completely. If unfactorable, indicate that the polynomial is prime.x2 - 8x + 64
A. prime B. (x + 8)(x - 8) C. (x - 8)2 D. (x + 8)2