Why did Jacob Riis decide to photograph the slum condition ma in New York City

A. Educate people
B. Record history
C. Change society

Plz help

c. change society

Explanation:

The photos were not primarily to educate people, he wanted to inform people on these problems but also expose them in hope of solving the situation.

hello,

your answer whould be d

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