Find u ? v, where ? is the angle between the vectors u and v. Round the answer to the nearest tenth.
= 5, 
= 9, ? = 
A. 39
B. 52
C. 90
D. 22.5
Answer: A
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Solve.A square flower bed is to be enlarged by adding 3 meters on each side. If the larger square has an area of 169 square meters, what is the length of a side of the original square?
A. 19 m B. 7 m C. 10 m D. 16 m
Add.-55 + (-13)
A. 42 B. 68 C. -68 D. -42
Solve the problem.If a, b, and c are the lengths of the three sides of a triangle, the area A of the triangle is given by A = 
,where s = 
. Find the area of a triangle with sides of length 17 inches, 14 inches, and 19 inches. Round your answer to the nearest hundredth of a square inch.
A. 160.08 in.2 B. 114.89 in.2 C. 125 in.2 D. 235.85 in.2
Introduce slack variables as necessary and write the initial simplex tableau for the problem.Maximize z = 4x1 + 2x2 subject to: 2x1 + x2 ? 20 3x1 + 5x2 ? 75 x1 ? 0, x2 ? 0 
A. 
B. 
C. 
D. 
