Which term has the following definition? The distance a number is from zero on the number line.
O Proportion
O Axis
O Absolute value
O Expression

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! )