Find the value of n (3x9)x10=n x (9x10)

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

What is 6/10 rounded to the nearest half