Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = -2x - 1, [0, 2], left-hand endpoint
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Mathematics
Solve the problem.Suppose the following matrix represents the input-output matrix of a simplified economy. How many units of each commodity should be produced to satisfy a demand of 900 units for each commodity?
A.
X = 
B.
X = 
C.
X = 
D.
X = 
Mathematics
The matrices 
and 
are inverses of each other. Use this fact to solve the system 
.
What will be an ideal response?
Mathematics
Write as a logarithm of a single expression.2 log7 2 + 
log7 (r - 4) - 
log7 r
A. log7 
B. log7 
C. log7 
D. log7 
Mathematics