4. Which of the following could be appropriate values for an equation to be in Standard Form (AX + By = C)? O A = 4, B = 0) and C = 9
O A = 5, B = and C = 0
A = -6, B = 8 and C = 3
O A = 4, B = 1 and C=0

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

If the value of cos330°is√3/2 then find cos 165°.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )