Solve the system using matrices. x - y + 3z = -8 x + 5y + z = 405x + y + 13z = 10
A. (8, 8, 0)
B. Infinitely many solutions
C. (8, 0, 8)
D. No solution
Answer: D
Mathematics
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Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 8 days.
A. $22 B. $2200 C. $11,200 D. $112
Mathematics
Express the radical in simplest form, rationalize denominators, and perform the indicated operations.5
- 2
A. 55
B. -35
C. 35
D. -55
Mathematics
Solve the problem by integration.Find the moment of inertia with respect to the y-axis for the area bounded by 
the 
and 
where k is the mass per unit area.
A. 
tan-1 16
B. k ln 2
C. 
D. 
Mathematics
Write the percent in decimal format.726%
A. 7.27 B. 7.26 C. 72.6 D. 0.726
Mathematics