Answer:
f(n) = 32 - 8n
Step-by-step explanation:
24, 16, 8, 0
f(n) = 24 - 8 x (n-1)
f(n) = 32 - 8n
Step-by-step explanation:
4x+5x-9=15+x
We are going to collect like terms
9x-9=15+x
Answer: 75% off the original price.
Step-by-step explanation:Say an item is $100. 50% off $100 is of coarse $50.
Now 50% off that price is $25.
So the new price is now $25 which is 75% off.
Answer: 
Work Shown:
I'm assuming your teacher wants you to factor as much as possible.

In the last step, I used the rule that 
We cannot factor any further. If the first term was
instead of
, then we could use the difference of squares factoring rule.