Factor completely. If the polynomial cannot be factored, say it is prime.28x2 - 132x + 80
A. 4(7x - 5)(x - 4)
B. (7x - 5)(4x - 4)
C. 4(7x + 5)(x + 4)
D. prime
Answer: A
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Write a positive or negative fraction to describe the situation.Over last summer, 
of the teachers' desks were removed from the school.
A. - 
B. 
C. - 
D. 
Factor.42x3 + 18x2 + 49x + 21
A. (7x2 - 7)(6x + 7) B. 42x(7x2 + 3x + 10) C. (6x2 - 7)(7x - 3) D. (6x2 + 7)(7x + 3)
Solve the problem.A power plant is located on a river that is 600 feet wide. To lay a new cable from the plant to a location in a city 2 miles downstream on the opposite side costs $175 per foot across the river and $125 per foot along the land. Suppose that the cable goes from the plant to a point Q on the opposite side that is x feet from the point P directly opposite the plant. Write a function C(x) that gives the cost of laying the cable in terms of the 
A. C(x) = 175(600 - x) + 125(2 - x)
B. C(x) = 175
+ 125(2 - x)
C. C(x) = 175
+ 125(10,560 - x)
D. C(x) = 125
+ 175(10,560 - x)
Solve the problem.Find the hydrogen ion concentration of a solution [H+] whose pH is 7.3. Use the formula 
A. 5.01 × 10-8 moles per liter B. 2.00 × 107 moles per liter C. 8.63 × 10-1 moles per liter D. -8.63 × 10-1 moles per liter