Ruby is purchasing fencing to go around a rectangular lot which is 4x + 9 feet long and 3x - 5 feet wide. Which expression represents the amount of fencing she must buy? Do Not give me bitly it does not work but just copy what bitly says and paste dont give me the link!!!

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets, x, and the number of student tickets, y. find the solution and explain what it means. i'll you if you me

This question awards 100 ! i really don’t want to fail i will also mark you !