Alarge bottle of dragon breath mouthwash costs $5.00 before tax and $5.30 after tax. what is the percentage the tax?

7x+8y=-18, 4x-9y=-3 solve the system of equations

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

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)