A. write an expression for the total cost of three types of tickets .
b. the andrews family bought 2 adult tickets,3 children's tickets, and 1 senior ticket evaluate your expression in part a to find the total cost of the tickets.
c. the spencer family bought 4 adult tickets and 2 childrens tickets. did they spend the same as the andrews family explain

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

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