Find the sum and simplify the answer.
+ 
+ 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Find the perimeter of the triangle.
A. 27
feet
B. 27
feet
C. 45
feet
D. 27
feet
Find the volume of the specified solid. Use 3.14 as the approximate value of ?, and round your answer to the nearest tenth.A sphere with radius 0.55 in.
A. 1.3 in.3 B. 5.6 in.3 C. 0.4 in.3 D. 0.7 in.3
Solve the problem.The half-life of carbon-14 is 5700 years. Find the age of a sample in which 8% of the radioactive nuclei originally present have decayed.
Fill in the blank(s) with the appropriate word(s).
Pivot once about the circled element in the simplex tableau, and read the solution from the result. 
A. x1 = 6, s1 = -6, z = 6; x2, x3, s2 = 0 B. x1 = 12, s1 = 42, z = 12; x2, x3, s2 = 0 C. x1 = 12, s1 = 6, z = 12; x2, x3, s2 = 0 D. x1 = 12, s1 = -6, z = 12; x2, x3, s2 = 0