Does anyone know how to do this
a1=9
a_n= a_n-1 -4

In triangle opq right angled at p op=7cm, oq-pq=1 determine the values of sinq and cosq

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

What rotation was applied to triangle def to create d’e’f’?