This table gives a few (x, y) pairs of a line in the coordinate plane. (48,-30) (61,-45) (71,-60)

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 would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction