Determine the real solutions to the system of nonlinear equations.x2 + y2 = 4x + y = 2
A. (2,-2), (-2, -2)
B. (0, -2), (-2, 0)
C. (0, 2), (2, 0)
D. (0, 0), (2, -2)
Answer: C
Mathematics
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Solve the problem.Sue can sew a precut dress in 3 hours. Helen can sew the same dress in 2 hours. If they work together, how long will it take them to complete sewing that dress? Give your answer rounded to one decimal place, if necessary.
A. 1.8 hr B. 5 hr C. 2.5 hr D. 1.2 hr
Mathematics
Find the solution(s) (if any) of the system of equations by the graphical method. If the equations are dependent, write your answer with x being arbitrary.
A. {(1, 2)}
B. inconsistent
C. {(2, 1)}
D. 
Mathematics
Convert to radical notation and simplify.815/4
A. 243 B. 2187 C. 6561 D. 19,683
Mathematics
Find an equation for the graph.
A. y = 4 cos 
B. y = -4 cos (2x)
C. y = 4 cos (2x)
D. y = 4 sin (2x)
Mathematics