If sin theta/2 = 1/2 (a+ 1/a ), prove that: cos theta = - 1/2 * (a ^ 2 +1/a^2)

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

Nikita wants to apply for student aid to fund her college education. arrange the steps involved in nikita’s application for financial aid

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.