Which of the following would most likely have been left behind in the olduvia gorge? a: australopithecine b: homo habilis c: lucy d: neanderthal

b they found thousands of bones of are human ancestors 

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13

during world war ii, the united states officially had no propaganda, but the roosevelt government used means to circumvent this official line. one such propaganda tool was the publicly owned but government-funded writers' war board (wwb).

explanation: