What is the simplest form of this expression -x(7x+2)+x^2

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

What is the distance between point a and b

Which of the following shows the length of the third side, in inches, of the triangle below