Determine whether the ordered pair is a solution of the given linear equation.x = 12y; (1, 12)
A. yes
B. no
Answer: B
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Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed. 
A. A' ? C B. (A' ? B) ? C C. (A' ? B) ? C D. (A ? B') ? C
Write a general term an for the sequence. Assume that n begins with 1.1 ? 6, 2 ? 7, 3 ? 8, 4 ? 9, 5 ? 10, . . .
A. an = n(n + 5) B. an = n(n - 5) C. an = n + 5n D. an = n(n + 6)
New telephone lines must be installed to connect 9 cities (A, B, C, D, E, F, G, H and J). 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.
Using Kruskal's algorithm, which edge is chosen last?
A. EH B. AB C. BC D. DE E. none of these
Determine the number of solutions to the given system without graphing.
A. infinite number of solutions B. no solution C. one solution