Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them.x - z = 2y + z = 2x + z = 4
A. x = 3, y = 1, z = 1
B. x = 6, y = 2, z = 2
C. x = 1, y = 3, z = - 1
D. x = 2, y = 2, z = 0
Answer: A
Mathematics
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Factor, if possible.y6 - 8
A. (y2 + 2)(y4 - 2y2 + 4) B. (y2 - 2)(y4 - 2y2 + 4) C. cannot be factored D. (y2 - 2)(y4 + 2y2 + 4)
Mathematics
Determine the slope and y-intercept of the function.f(x) = 10x + 2
A. m = 10; b = -2 B. m = 10; b = 2 C. m = -10; b = 2 D. m = -10; b = -2
Mathematics
Decide whether or not the functions are inverses of each other.f(x) = (x - 2)2, x ? 2; g(x) = 
+ 2
A. No B. Yes
Mathematics
Determine whether the point (7, 8) is in the feasible set of the system of inequalities:
A. Yes B. No
Mathematics