Tiffany and Mansi set up a lemonade stand and sell cups of lemonade at a rate of 7 cups per hour. After 5 hours there are 89 cups left. Find out how many cups the young entrepreneurs started with.
If they continue to sell at the same rate, how many cups will they have after 15 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

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?