The question(s) that follow refer to the problem of finding the minimum spanning tree for the weighted network shown below. 
Give the weight of the MST.
A. 79
B. 96
C. 89
D. 90
E. 111
Answer: C
Mathematics
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Solve the equation by multiplying both sides by the LCD.
= 1 + 
A. {8, -10} B. {-20, 10} C. {10} D. {-8, 10}
Mathematics
Determine if the given solution is correct. If it is not, find the solution.Is -6 the solution to x + 6 = 7 - 7?
A. no; x = 6 B. no; x = 20 C. no; x = 8 D. yes
Mathematics
Add mentally.5 + 0 + 7 + 6 + 9 + 0 + 2
A. 29 B. 31 C. 28 D. 30
Mathematics
Solve the problem.
The graph shows the amount of water in a 200-gallon tank after x minutes have elapsed. (i) Is the water entering or leaving the tank? (ii) Find the x-intercept and the y-intercept.
A. Entering; x-intercept is 200 and y-intercept is 0 B. Leaving; x-intercept is 0 and y-intercept is 200 C. Leaving; both intercepts are 0 D. Entering; both intercepts are 0
Mathematics