Solve the problem.A weight attached to a spring is pulled down 8 inches below the equilibrium position. Assuming that the frequency of the system is 
cycles per second, determine a trigonometric model that gives the position of the weight at time t second.
A. y = 8cos 10t
B. y = 8cos 5t
C. y = -8cos 10t
D. y = -8cos 5t
Answer: C
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To travel 68 miles, it takes Sue, riding a moped, 4 hours less time than it takes Doreen to travel 80 miles riding a bicycle. Sue travels 7 miles per hour faster than Doreen. Find the times and rates of both girls.
A. Sue: 17 mph for 4 hours, Doreen: 10 mph for 8 hours B. Sue: 10 mph for 4 hours, Doreen: 17 mph for 8 hours C. Sue: 21 mph for 8 hours, Doreen: 14 mph for 12 hours D. Sue: 4 mph for 17 hours, Doreen: 10 mph for 8 hours E. Sue: 27 mph for 4 hours, Doreen: 20 mph for 8 hours
Write the symbolic representation for f(x, y) given that f computes the indicated inequality.Five times the sum of x and y
A. f(x, y) = 5x + y B. f(x, y) = 5(xy) C. f(x, y) = 5(x + y) D. f(x, y) = x + 5y
Find zw or 
as specified. Leave your answer in polar form.z = 8
w = 3
Find zw.
A. 12
B. 24
C. 12
D. 24
Solve the system using the inverse method.
A. x = 2, y = -9, z = 1 B. x = -8, y = -16, z = 2 C. x = -13, y = -46, z = -29 D. x = -3, y = 2, z = -3