A coach company is taking 400 people on the trip. Each coach seats 46 people. the cost is $120 for each coach. Show your working (a) How many coaches do they need for everyone?
(b) What is the total cost for the coaches?
(c) The total cost is shared between the people on the trip. How much does each person say?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.

What is the the greatest common factor ?