Auberys dinner cost $85 she tips the waitstaff 30% for excellent service. HOW much does aubery tip the waitstaff​

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 liters, including 3,000 liters of work in process at the beginning of the period. the ending work in process was 5,000 liters. how many liters were started and completed during the period?

The elmina wilson company produces spaghetti sauce that is used in restaurants. the fixed costs total $1,329,050. the selling price per 64 oz. can of sauce is $12.40. the variable cost per can is $4.80. what is the break-even point in number of cans?

Amath club has 40 members. the number of girls y is 6 less than the number of boys. how many members are boys x? how many members are girls y?