Alicia is fundraising for her soccer team by selling popcorn and cookies. She manages to sell 12 tins of popcorn and 21 tubs of cookies for a total of $320.55 on her first day of sales. The second day she ends up selling more. She sells 15 tins of popcorn and 32 tubs of cookies for a total of $447.55. What was the individual cost of each tin of popcorn and tub of cookies?

The ratio of two numbers is 5 to 4. the sum of the numbers is 99. what number is the greater of the two numbers?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3