Factor completely, or state that the polynomial is prime.12x2 - 52x - 40
A. (12x + 8)(x - 5)
B. 4(3x - 2)(x + 5)
C. prime
D. 4(3x + 2)(x - 5)
Answer: D
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Find the average value of 
over the given region.
over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 
C. 243
D. 
Solve.Muffy buys pencils, sharpeners, and erasers from the bookstore for her class. She bought 4 more pencils than sharpeners and 5 fewer erasers than sharpeners. A pencil costs 21 cents; a sharpener costs 39 cents; and an eraser costs 20 cents. If Muffy spent a total of $13.44, how many erasers did she buy?
A. 22 erasers B. 21 erasers C. 17 erasers D. 12 erasers
Factor the polynomial completely. If the polynomial cannot be factored, write "prime."x2 + 2x - 48
A. prime B. (x - 6)(x + 8) C. (x + 6)(x + 8) D. (x + 6)(x + 1)
Solve the equation using the quadratic formula.(2x - 1)(x + 1) = 3
A. 
B. 
C. 
D. 