Solve the system by the substitution method. Be sure to check all proposed solutions. x + 2y = 146x + 3y = 21
A. {(-7, 0)}
B. {(0, 7)}
C. {(1, 6)}
D. ?
Answer: B
Mathematics
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Use the table to determine the indicated derivative or state that the derivative cannot be determined.
(f-1)'(7)
A. 
B. 
C. 1
D. - 
Mathematics
Convert the following.179 cm2 to square meters
A. 17.9 m2 B. 1.79 m2 C. 0.0179 m2 D. 0.179 m2
Mathematics
For the functions f(x) and g(x), determine the domain of (f - g)(x) (the difference of f and g).f(x) = 
, g(x) = 
A. {x ? x is a real number} B. {x ? x is a real number and x ? 3 and x ? 2} C. {x ? x is a real number and x ? 3} D. {x ? x is a real number and x ? -3 and x ? -2}
Mathematics
Solve the equation.
(9x - 15) = 
(25x - 15)
A. {1}
B. {-15}
C. {-1}
D. 
Mathematics