Can anyone help me out on this? It’s pretty urgent :/

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

Evaluate the expression for the given value of the variable 7a - 4a for a =8

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68