Ahot air balloon to descends 305 feet per minutes for 4 minutes and then ascends at a rate of 215 feet per minute for another 2 minutes. find the total change in the balloon's altitude

/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?

Which of these triangle pairs can be mapped to each other using two reflections?

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.