Use the formula S=P-PD
S is sale price, original price is P, and PD is discounted percent,
276.25=P-P(.65), I turned the percent into a decimal.
276.25=P(1-.65)
276.25=P(1-.65)
276.25=P(.35)
Now cross multiply.

Hope this helps, now you know the answer and how to do it. Stay healthy and safe and HAVE A BLESSED AND WONDERFUL DAY! :-)  
- Cutiepatutie ☺❀❤
 
        
             
        
        
        
A function 

 is periodic if there is some constant 

 such that 

 for all 

 in the domain of 

. Then 

 is the "period" of 

.
Example:
If 

, then we have 

, and so 

 is periodic with period 

.
It gets a bit more complicated for a function like yours. We're looking for 

 such that

Expanding on the left, you have

and

It follows that the following must be satisfied:

The first two equations are satisfied whenever 

, or more generally, when 

 and 

 (i.e. any multiple of 4).
The second two are satisfied whenever 

, and more generally when 

 with 

 (any multiple of 10/7).
It then follows that all four equations will be satisfied whenever the two sets above intersect. This happens when 

 is any common multiple of 4 and 10/7. The least positive one would be 20, which means the period for your function is 20.
Let's verify:


More generally, it can be shown that

is periodic with period 

.
 
        
        
        
Answer:
24 mouths have passed 
Step-by-step explanation:
 
        
             
        
        
        
The correct answer you need will equal 9