PLEASE HELP!! Define a variable and write an equation to find each number. Then solve.
James joined a skating class that costs $37 per month and $2.50 for skate rental per session. Alex joined another skating class that costs $45 per month and 50 cents for skate rental per session. If they spend equal amount of money, how many sessions do they each attend?

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?

How many grams the dog will eat in 3 days?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0