Solve the system by solving the corresponding matrix equation with an inverse.
?
?
?
A. 
B. 
C. 
D. 
E. 
Answer: C
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Solve the problem.Find the number of games played in a round robin tournament for the given numbers of teams. In a round robin tournament every team plays every other team once.
Use inductive reasoning to find a formula for the number of games played in a round robin tournament involving n teams.
A. 6 teams: 16 games 7 teams: 20 games n teams : 4(n - 2) games B. 6 teams: 21 games 7 teams: 28 games n teams : n(n + 1)/2 games C. 6 teams: 15 games 7 teams: 21 games n teams : n(n - 1)/2 games D. 6 teams: 14 games 7 teams: 18 games n teams : 4n - 10 games
Evaluate the integral.
dz
A. csc 
+ C
B. -cot 
+ C
C. - 
csc 
+ C
D. -csc 
+ C
Determine whether the graph of the given equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.y = |4x| + 2
A. No symmetry B. Origin C. y-axis D. x-axis
Solve the problem.If x is the hydrogen ion concentration of a sample of water, then the pH of that water sample is 
If the pH of the water from one lake is 6.3 and the pH of the water from a second lake is 7.6, how many times greater is the hydrogen ion concentration of the second lake than the hydrogen ion concentration of the first lake? Round your answer to the nearest hundredth.
A. 19.95 B. 6.74 C. 0.05 D. 16.08