Which of the following is the solution of the given system of equations?
2x + 2y + z = -12

x + z = 20

x = 1

a) (1, -33/2, 19 )

b) ( 1, 33/2, 19)

c) (1, -17, 19)

d) (1, -25, 21)

(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 representation has a constant of variation of -2.5

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?