A $100 pair of headphones is marked down by 10% and you also have a 20% off coupon. What is the final price, before tax?

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Which expression is rational? 6. , square root two, square root 14, square root 49

With alll of except for the 2 that i did already