If f(1)=5 and f(3)=7 and f(8)= -10 what is f to the negative 1 power (5)

Find the commission on a $590.00 sale if the commission is 15%.

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs