Is 2.6666666667 a rational number

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

What is not true about kl and mn? what is mn? (show )

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! )