Use Cramer's rule to solve the system.7x + 8y=42x + 3y=2
A. {(- 
, 
)}
B. {(
, 
)}
C. {(- 
, 
)}
D. {(
, - 
)}
Answer: C
Mathematics
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Solve the problem.Find the mass of a thin circular plate bounded by 
if 
.
A. 2? B. 1? C. 4? D. 8?
Mathematics
Identify and graph the polar equation.r = -2 cos 5?
A. rose with 5 petals
B. rose with 5 petals
C. limacon with inner loop
D. limacon with no inner loop
Mathematics
Use the Urban Prices Index Table to answer the question. The table shows what $100 worth of an item costs today. 
*All figures are expressed as a percent of the base of 100 from two decades ago.Urban area: ChicagoWhat does $100 of Transportation cost today?
A. $219.20 B. $186.30 C. $213.40 D. $112.40
Mathematics
Evaluate.
A. 30 B. 15 C. 1.308 × 1012 D. 210
Mathematics