If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions.
x + 
y = 3
x - 
y = 
A. (7, 2)
B. (1, 8)
C. (8, 1)
D. (-8, 2)
Answer: C
Mathematics
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Determine the number of spanning trees in the graph.
A. 10 B. 23 C. 11 D. 24
Mathematics
Write the mixed number as an improper fraction.20
A. 200
B. 
C. 30
D. 
Mathematics
Differentiate.y = 11x2
A. 11x2 ? x ? ln 11 B. 11x2 ? 2x ? ln 11 C. 11x2 ? 2x ? ln x D. 2x(ln 11)
Mathematics
Find the product and simplify.
A. 
B. 
C. 
D. already simplified
E. none of these
Mathematics