Factor the polynomial completely. If the polynomial cannot be factored, say it is prime.4y3 - 4y2 - 80y
A. 4y(y + 4)(y - 5)
B. (y - 4)(4y2 + 20)
C. 4y(y - 4)(y + 5)
D. (4y2 + 16y)(y - 5)
Answer: A
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Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x - y + 3z = -114x + z = -2 x + 3y + z = 13
A. (-2, 0, 5) B. No solution C. (-2, 5, 0) D. (0, 5, -2)
Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. z - 6
Add or subtract as indicated.
+ 
A. 
B. 
C. 
D. 
Solve the problem.The manager of a bulk foods establishment sells a trail mix for $6 per pound and premium cashews for $12 per pound. The manager wishes to make 90 pounds of a 
mixture that will sell for $10 per pound. How many pounds of each should be used?
A. 30 pounds of trail mix 60 pounds of cashews B. 45 pounds of trail mix 45 pounds of cashews C. 60 pounds of trail mix 30 pounds of cashews D. 75 pounds of trail mix 15 pounds of cashews