Factor completely. If the polynomial cannot be factored, write "prime."16x2 + 81
A. prime
B. (4x + 9)(4x - 9)
C. (4x - 9)2
D. (4x + 9)2
Answer: A
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Work the application. Write a legend and an equation. Solve the equation and answer in a complete sentence.Each box of matches contains 120 matches. Boxes of matches are shipped in cartons. Each carton contains 15 boxes of matches. How many matches are in each carton?
A. Let n = number of matches in each carton. 15 ? n = 120 Each carton contains 135 matches. B. Let n = number of matches in each carton. 120 ? 15 = n Each carton contains 180 matches. C. Let n = number of matches in each carton. 15 ? n = 120 Each carton contains 8 matches. D. Let n = number of matches in each carton. 120 ? 15 = n Each carton contains 1800 matches.
Reverse the order of integration and then evaluate the integral.
A. 6 sin 5 B. 5 cos 6 C. 5 sin 6 D. 6 cos 5
Use the weighted graph shown to answer the question. 
Find the weight of edge BC.
A. 16 B. 9 C. 64 D. 8
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 