Suppose a heat exchanger costs $1200 and reduces the heating bill by $200 per year what is the payback time?

How to write 3 tenths and 5 tenths as a decimal

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Triangle knm is what is true about the sides of knm