Solve the system using the graphing method. 3x + 3y = 10-15x - 15y = 10 
A. {(-5, -10)}
B. {(5, 10)}
C. {(1, 1)}
D. ?
Answer: D
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Use trigonometric identities to solve each equation in the interval [0, 2?] tan2 x = - 
sec x
A. 
B. 
C. 
D. 
Determine the real solutions to the system of nonlinear equations.x2 + y2 = 1616x2 + 25y2 = 400
A. (4, 0), (-4, 0) B. (0, 5), (0, -5) C. (5, 0), (-5, 0) D. (0, 4), (0, -4)
Solve the problem.The table shows the population of a city over the past five years.
We used these data to develop the quadratic equation 
, which models the population of the city y in millions in the year x, where x = 0 represents 1995, x = 1 represents 1996, and so on. Use the model to find the estimated population in the year 1998.
A. 1,490,000,000,000 B. 1,490,000 C. 68,852,000 D. 71,628,000
Simplify the expression, leaving your answer with only positive exponents. Assume that all variables represent positive numbers.
A. 9x-1/12 B. 9x-5/8 C. 9x-5/12 D. 32x-1/12