By 1910, nearly 60 percent of american children were in school because

By 1910, nearly 60 percent of American children were in school because many states required school attendance by law. Education at this time is compulsory over an age range( between 5 and 8) and ending somewhere between ages 16, and 18 (depending on the state). Between 1910 and 1940, 72% of children attended school. High school movement rapidly increased public school enrollment and graduations.

i dont know but i need points

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27