Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 9x + 6y - z = 75 x - 2y - 6z = -66 9x + y + z = 53
A. {(4, 9, 8)}
B. {(-4, 8, 8)}
C. {(4, 8, 9)}
D. ?
Answer: C
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Solve the problem.A rectangular horse pen is to be fenced and divided into five partitions as shown. The length of the fenced-in area is to be twice the width, and the total amount of fencing to be used is 290 feet. Find the length and width of the fenced-in area.
A. length = 64.4 feet, width = 32.2 feet B. length = 24.1 feet, width = 12 feet C. length = 58 feet, width = 29 feet D. length = 31 feet, width = 29 feet
Find the limit.
sec 
A. 1
B. - 
C. 0
D. -1
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 + 4, [0, 2], left-hand endpoint
A. 
B. 
C. 
D. 
Solve the problem. Use 3.14 for ? and round to the nearest tenth.A figure skater must trace a figure eight on the ice that consists of two perfect circles, each with a radius of 10 feet. How far does the skater go one time around the figure eight?
A. 31.4 ft B. 29.4 ft C. 62.8 ft D. 125.6 ft