Which expression can be used to find the area of the rectangle shown on the coordinate plane?

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! )

Which of the following is an arithmetic sequence

Use the balanced scale to find the conversion factor that can be used to convert the number of blocks to the weight of the blocks in pounds.