Simplify.12 - (20 - 18)
A. 14
B. 10
C. 50
D. -26
Answer: B
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Use the following information to classify the triangle and solve for the missing angle. 
A. right, 40° B. right, 90° C. obtuse, 50° D. acute, 40°
Solve the triangle.A = 40°, B = 30°, a = 3
A. C = 110°, b = 2.33, c = 4.39 B. C = 110°, b = 4.39, c = 2.33 C. C = 110°, b = 4.39, c = 1.33 D. C = 110°, b = 3.33, c = 4.39
Solve the problem. Round to the nearest tenth, if necessary.A long-distance runner runs 4 miles directly south and then faces due east and runs another 8 miles. How far is the runner, in a straight line, from his starting point? 
A. 40 mi B. 6 mi C. 8.9 mi D. 4.45 mi
Find all solutions of the equation in the interval [0, 2?). Round the solution to four decimal places.4 tan x + 9 = 0
A. {1.9890} B. {1.9890, 5.1306} C. {4.2942, 5.1306} D. {1.1526, 4.2942}