Tell me everything I need to know and please work out the problems

Name the type of angle shown.calculation tip: common types of angles are zero, straight, right, acute, or obtuse.

(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 .

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?