Solve the problem.The sum of the squares of two numbers is 130. The difference of the two numbers is -16. Find the two numbers.
A. -9 and -7 or 7 and 9
B. -7 and 9 or -9 and 7
C. -9 and 7
D. -7 and 9
Answer: B
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Use the integral test to determine whether the series converges.
A. diverges B. converges
Solve the following system by any appropriate method. If there is no real number solution, so state.y - 12x = 012x2 + y2 = 156
A. (1, 12) B. (-1, -12) C. (-1, -12), (1, 12), (-1, 12), (1, -12) D. (-1, -12), (1, 12)
Solve the problem.For what values of x would the rectangle have a perimeter of at least 278? 2x + 1 
A. 29 or greater B. 14 or less C. 29 or less D. 14 or greater
x? = x(0.1? 0.004x ? 0.001y) , y? = y (0.05 ? 0.001x ? 0.001y) , x (0) = 3, y (0) = 2
For the systems of differential equations, use Euler’s method with ?x = 2 to plot the trajectory of x and y to plot the trajectory for 0 ? t ? 500.