Use Cramer's rule to solve the system. 2x + 5y=43 2x + 2y=22
A. {(-7, 4)}
B. {(4, -7)}
C. {(4, 7)}
D. {(7, 4)}
Answer: C
Mathematics
You might also like to view...
Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form 
625x2 + 196 = 0
A. 
B. 
C. 
D. 
Mathematics
Add. Simplify, if possible.
+ 
A. 
B. 3
C. 
D. 
Mathematics
Solve the problem.For the total-cost functionC(x) = 0.01x2 + 2.2x + 80,find ?C and C'(x) when x = 100 and ?x = 1.
A. ?C = $4.21; C'(100) = $3.20 B. ?C = $4.20; C'(100) = $4.20 C. ?C = $4.21; C'(100) = $2.22 D. ?C = $4.21; C'(100) = $4.20
Mathematics
Use the graph of a quadratic function to find the solution set of the equation or inequality. For a solution set that involves an interval, use interval notation.x2 + 4x + 11 ? 0
A. (-?, ?) B. ? C. (-?, 11) ? (11, ?) D. x = 11
Mathematics