F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

Aline passes through 3,7 and 6,9 what equation represents the line

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.