Factor completely. If the polynomial cannot be factored, write "prime."x3 - x2 - 30
A. (x2 + 6)(x2 - 5)
B. (x2 + 1)(x2 - 30)
C. (x2 + 5)(x2 - 6)
D. Prime
Answer: D
Mathematics
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Factor by grouping. If prime, so state.12x2 - 15xy + 8xy - 10y2
A. (12x + 2y)(x - 5y) B. (3x + 2)(4x - 5) C. (3x - 2y)(4x - 5y) D. (3x + 2y)(4x - 5y)
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Determine if the function is concave up or concave down in the first quadrant.y = x3/2
A. Concave up B. Concave down
Mathematics
Solve the problem.Two trains leave a train station at the same time. One travels east at 12 miles per hour. The other train travels west at 7 miles per hour. In how many hours will the two trains be 114 miles apart?
A. 12 hr B. 3 hr C. 6.5 hr D. 6 hr
Mathematics