Help me ASAP

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Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

(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 .