How do u factor out the coefficient of the 3.2m + 6.4

Find the value of the cosine for angle a

Could someone with number 1 and 2

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.