For the following systems of equations in echelon form, tell how many solutions there are in nonnegative integers.x - 5y + 8z = 60 2y + 5z = 44
A. 7
B. 9
C. 6
D. 5
Answer: D
Mathematics
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Express the limit as a definite integral where P is a partition of the given interval.lim
?0
?xk, [0, 6?]
A. 
dx
B. 
dx
C. 
dx
D. 
dx
Mathematics
Find the domain of the logarithmic function.f(x) = ln 
A. (0, ?) B. (1, ?) C. (-7, ?) D. (7, ?)
Mathematics
Solve the problem.The graph shows the total sales in thousands of dollars from the distribution of x thousand catalogs. Find the average rate of change of sales with respect to the number of catalogs distributed for the change in x.
10 to 30
A. 3
B. 
C. 
D. 1
Mathematics
Graph the function.y = 2 cot 3x
A. 
B. 
C. 
D. 
Mathematics