Describe and correct the error in solving the equation for X

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?