Find the output when the input is n. input: 1,2,3,4,n output:-4,0,4,8. I need this answer ASAP

How do you find principle and simple interest

Reflect the point (7,0) across the y-axis

Handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony?