Solve the system for x and y using Cramer's rule. Assume a and b are nonzero constants.
x + 
y = abx + y = a
A. 
B. 
C. 
D. {(ab (1 - ab), a2 (b2 - 1))}
Answer: B
Mathematics
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Write fraction in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Convert the units.768 ounces = 
pounds
A. 192 B. 48 C. 49 D. 76
Mathematics
Find the focus and directrix of the parabola with the given equation.5y2 = -4x
A. Focus: 
, directrix: x = 
B. Focus: 
, directrix: x = - 
C. Focus: 
, directrix: y = 
D. Focus: 
, directrix: y = 
Mathematics
Solve the problem.Assuming two parents, four grandparents, etc., what is the total number of ancestors a person has going back 9 generations?
A. 1022 ancestors B. 510 ancestors C. 256 ancestors D. 512 ancestors
Mathematics