Mr. Fiore had to go to Party City to buy balloons for Homecoming. He purchased orange balloons and white balloons. Orange balloons cost $.50 each and white balloons cost $.40 each. Mr. Fiore
spent a total of $102.50 and bought a total of 225 balloons. How many orange balloons and how many
white balloons did he buy?

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.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Similarly fie each expression 18,19,20