Use an identity to write the expression as a single trigonometric function or as a single number.sin 22.5°cos 22.5°
A. 
B. 
C. 
D. 
Answer: A
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Use Pascal's triangle to expand the binomial.(x - 9)5
A. x5 - 45x4 + 1620x3 - 14,580x2 + 32,805x - 9 B. x5 - 45x4 + 810x3 - 7290x2 + 32,805x - 9 C. x5 - 45x4 + 810x3 - 7290x2 + 32,805x - 59,049 D. x5 - 45x4 + 1620x3 - 14,580x2 + 32,805x - 59,049
Evaluate.
A. 6435 B. 495 C. 1287 D. 99
Solve the problem.The cost of producing a shipment of widgets that you supply to various regional businesses consists of a setup expense of $20 plus $0.20 per widget. Let C be the total cost of producing a shipment, and let x represent the number of widgets in a shipment. Write in symbolic form an equation that will relate C and x. Generate five data points from this equation using equally incremented x values ranging from 100 to 500, and use this data to plot a graph. What is the cost of producing a shipment of 350 widgets?
A. C = 20 + 0.20x; The cost of producing a
shipment of 350 widgets is $100.00.
B. C = 0.20x; The cost of producing a
shipment of 350 widgets is $70.00.
C. C = 20 + 0.20x; The cost of producing a
shipment of 350 widgets is $90.00.
D. C = 20 + 0.20x; The cost of producing a
shipment of 350 widgets is $70.00.
Solve the inequality. Express your answer using interval notation. Graph the solution set.x + 1 < 4
A. (-?, 3)
B. (-?, 5)
C. (-?, 5]
D. (3, ?)