Raul has 50 coupon books to sell. he must sell at least 10 coupon books to win a prize. the amount of money raul makes from selling x coupon books is represented by a function. f(x)=20xf(x)=20x what is the practical domain of the function? all integers from 10 to 50, inclusive all multiples of 20 between 0 and 1000, inclusive all real numbers all integers from 0 to 50, inclusive

/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?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?