Is anyone else taking Algebra 2 honors on Edge nuity? let me know

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

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)