Simplify the expression by using a sum or difference identity.cos 
cos 
+ sin 
sin 
A. 
B. 
C. - 1
D. 
Answer: D
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Use the four-step method in problem solving to solve the problem.Andrea decided to rollerblade to her mother's house. Six blocks from her home, one of the wheels on her skate broke, and she had to walk the remaining eight blocks to her mother's. She could not repair her skate and had to walk all the way back home. How many more blocks did Andrea walk than she skated?
A. 22 blocks B. 16 blocks C. 28 blocks D. 14 blocks
Solve.It is recommended that there be at least 7 square feet of work space for every person in a conference room. A certain conference room is 11 feet by 16 feet. Find the maximum number of people the room can accommodate.
A. 25 people B. 35 people C. 45 people D. 26 people
Provide an appropriate response.What is generally true for lines with a positive slope and lines with a negative slope?
A. A line with a positive slope rises as we go from right to left, and a line with a negative slope drops as we go from right to left. B. A line with a positive slope rises as we go from left to right, and a line with a negative slope drops as we go from left to right. C. A line with a positive slope is perpendicular to a line with a negative slope. D. A line with a positive slope rises as we go from left to right, and a line with a negative slope drops as we go from right to left.
Find the remaining sides of a 30° - 60° - 90° triangle if the longest side is 10. ?
A. 
, 
B. 4, 
C. 3, 
D. 5, 
E. 
, 