Solve the system of equations by the substitution method. Check your solutions. For any dependent equations, write your answer in the ordered pair form.
A. {(9, 2)}
B. {(0, 11)}
C. ?
D. {(x, 2 - x)}
Answer: C
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Determine which values of x and y, if any, are not permissible. f(x, y) = (5x - 2y)5
A. y ? 0 B. All values of x and y are permissible. C. x ? 0 D. The point (0, 0) is not allowed.
Solve the problem.In the circle patterns below, each number in a large circle is the sum of the numbers in the two adjacent small circles. The pattern on the left is complete, but the problem is to complete the pattern on the right. Do so by letting x denote the value in one of the small circles. Then obtain expressions and equations that let you solve for x and determine the values in all three small circles.
A. 
B. 
Solve the problem.Assume that G is a graph with no loops or multiple edges. It is known that G has 5 vertices, 4 edges, and that the degree of each vertex is either 1 or 2. What can be said about G?
A. G is not a tree. B. G has 4 bridges. C. G is a tree. D. G could be a tree. E. none of these
Find the acute angle between the lines.3x - y = -16 and 2x + y = 13
A. 30° B. 45° C. 60° D. 75°