H e r e i s t h e a n s w e r !
1. 12*100 - 12*5
You would use the distributive property to get this equation (it is equivalent to the original one)
2. Um... There's no actual story for this problem; sorry I can't solve this problem
The period will be the length for one cycle of the function.
answer: 10
the answer to the equation is x=15
