Answer:
270 = number who get news from print sources
630 = number who get news from social media
Step-by-step explanation:
Let 3x = number who get news from print sources
and 7x = number who get news from social media
Then 3x + 7x = 900
10x = 900
x = 90
3x = 3(90) = 270 = number who get news from print sources
7x = 7(90) = 630 = number who get news from social media
Check: 270/630 = 3/7 and 270 + 630 = 900
A: 
Multiply both sides by 12
Answer:
B: 
Multiply both sides by 2,

Multiply both sides by N,

Divide both sides by 7,
Answer:
C: 
Multiply both sides by 2,

Multiply both sides by N,

Simplify,
Answer: 
Hope I helped you!
Answer:
15 to the 3rd power and false
Step-by-step explanation: