Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, -5)}
B. {(-2, -5)}
C. no solution; ?
D. {(-1, -6)}
Answer: D
Mathematics
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Solve the system by graphing. Check the coordinates of the intersection point in both equations.
A. {(5, 2)} B. {(-5, 2)} C. {(x, y) ? 2x + y = -8} D. ?
Mathematics
Multiply.(5 - 3
)2
A. 25 + 9
B. 70 - 30
C. 70 + 30
D. 25 - 9
Mathematics
Determine whether the vectors v and w are parallel.v = 
, w = 
A. Parallel B. Not parallel
Mathematics
Decide whether or not the equations are equivalent.x = 4 - 3x2x = 4
A. Not equivalent B. Equivalent
Mathematics