Solve the system of equations.x2 + y2 = 181x + y = -19
A. (9, 10), (10, 9)
B. (9, -10), (10, -9)
C. (-9, -10), (-10, -9)
D. (-9, 10), (-10, 9)
Answer: C
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Solve the problem.Find an equation of a parabola that contains the points (1, 3), (2, 6), and (4, 24).
A. y = 2x2 - 3x + 3 B. y = 2x2 - 3x + 4 C. y = x2 - 5x + 3 D. y = 2x2 - 5x + 4
New telephone lines must be installed to connect 8 cities (A, B, C, D, E, F, G, and H). Due to government regulations, the only possible connections that are allowed are shown by the edges on the network below. The numbers on the edges indicate the cost (in millions of dollars) of each possible connection. The telephone company wishes to connect the cities in the cheapest possible way.
The total cost of the optimal solution to this problem is
A. 24 million. B. 22 million. C. 21 million. D. 18 million. E. none of these
Find the exact value of the expression using the provided information.Find tan(s + t) given that sin s = 
, with s in quadrant II, and 
with t in 
A. 
B. 
C. 
D. 
Graph the function as a solid line or curve and its inverse as a dashed line or curve on the same axes.f(x) = 
x - 4
A. 
B. 
C. 
D. 