Please help worth 20 points! (this is legit my math grade .-.)

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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

Solve for x in the equation x2 - 12x + 36 = 90. x= 6+3x/10 x=6+2/7 x= 12+3/22 x = 12+3/10