Help timed test! For which pair of functions is...

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

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?