Find the exact value of sin22.5 (using the half angle formula)

I don't get it because it is hard

The product is 63. the sum of the factors is 16. their differences is 2. what are the factors?

Courtney works as a court reporter in the municipal court system. Her regular hourly wage is $19.50 per hour. She usually earns $682.50 in a week. How many regular hours does Courtney usually work?

The wait time to ride the Sky Coaster is 45 minutes when 9 people are in line. At this rate, how long is the wait time (in hours) when 27 people are in line? * Remember there are 60 minutes in each hour?

Q=p (r s) Solve for p.

A sandwich costs $0.75 more than a container of milk. A customer buys 4 sandwiches and 4 containers of milk. The customer pays $7.00. What is the cost of a sandwich?

two trains are 550 miles apart heading toward each other on parallel tracks. Train A is traveling east at 35 miles per hour, while train B travels west at 45 miles per hour. When will the trains meet each other in their respective tracks?

How do you expand (x-4) ^2?

19. How many 2-inch segments are there in 12 ft.? A. 24 B. 72 C. 10 D. 6

What is the perimeter of the rectangle shown below? apex algebra 1 sem 1 unit 6