Într-un hotel sunt camere cu 3 sau 4 paturi, in total 100 de paturi. câte camere cu 3 paturi si câte 4 paturi pot fi în hatel, dacâ din fiecare fel sunt cel puţin 10

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons