Solve the system of equations.2x+ y=-5-3y+ 2z=3-4x + 4y- 4z=4
A. No solution; inconsistent system of equations
B. (-4, 1, 3)
C. (-3, 1, 4)
D. Infinite number of solutions; dependent equations
Answer: D
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Solve the equation for x, where x is restricted to the given interval.y = cos (x + 12), for x in [-12, ? - 12]
A. x = arccos y + 12 B. x = arccos (y + 12) C. x = arccos y - 12 D. x = arccos (y - 12)
Determine whether the function is a polynomial function.f(x) = 5x7 - x5 + 
x
A. Yes B. No
Solve the problem.A triangle has an area of 2x2 + 9x - 45. Use factoring to rewrite this expression.
A. (2x - 15)(x + 3) B. (2x + 15)(x - 3) C. (2x + 15)(x + 3) D. (2x - 15)(x - 3)
Four commuter trains and two express buses depart from city A to city B in the morning, and three commuter trains and two express buses operate on the return trip in the evening. In how many ways can a commuter from city A to city B complete a daily round trip via bus and/or train?
__________ possible ways