Find the ratio a: b, if it is given that a/5 = b/7

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

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4